I'm just guessing here.
But that is all speculation since this entire scenario is a 'what if?'.
All he did was float around in a mass of shadows, look angry, and go "Cryssstalssss". He is very one dimensional and feels like his sole purpose of existence was to make an episode, whereas Discord and Chrysalis have goals and motives.
Discord wants to be entertained and his method of doing so is to cause a ton of chaos with his incredibly strong magic wherever he goes.
Chrysalis wanted to conquer Equestria so that her children had something to eat and could live and thrive.
Sombra wanted the Crystal Empire back basically 'because reasons' and he had almost zero personality due to almost zero screen time. They tried to do a mysterious, formless villain that would be frightening and just... didn't do it right, in my opinion. It came off as shallow and contrived, to me.
Despite all this, I still greatly enjoyed the episodes. They were entertaining and fun to watch. I just feel like Sombra could have been done better.
Compared to someone like Discord or even Chrysalis, Sombra is nearly lobotomized. His only personality trait that we know of is that he wants power and he is willing to enslave the ponies of the Crystal Empire to get it.
We know absolutely nothing about him other than that. It is a /very/ bland characterization when you compare him to someone like Discord, Chrysalis, or even Trixie. They are all real live people with real motives and real goals and motives and expectations. Sombra had no real reason given as to why he wants the Crystal Empire other than a desire for power.
A desire for power is a bland, boring, lazy excuse. It is cliche and not what I expect from the MLP writers at this stage of the game. They have proven that they can do much, much better than that.
It is not bad, per se, but disappointing.
I will admit that this just gives them room in the future to develop him, but for now I find him to be substandard in comparison with the rest of the show.
Now! On to you. If you would like to discuss something I am more than open to doing so, but I suggest you learn how to formulate a thought, argument, and study the proper use of commas before you try again.
Then again, I'm asking someone on the internet to put actual effort into their posts rather than just flaming, so I doubt it will happen. Cue the grammar Nazi reply?
I was saying from a writing and character perspective that Hasbro made Chrysalis and Discord far deeper and understandable characters. It is much easier to relate to and understand what they were after.
And you want to talk about exposition yapping? At least they had some sort of story and reason to be there. The Crystal Empire literally appeared out of nowhere and had to be explained entirely through exposition instead of being properly foreshadowed and no real reason was given as to why. The writers just waved their hands in the air and went "It was a curse!" when they already went to length to prove that curses do not exist in the poison joke episode.
And on a final note: Incompetent? It took the Elements of Harmony to defeat Discord. It took Shining Armor and Cadance's love to banish Chrysallis, which was only made possible with the Mane 6's assistance. Sombra somehow made the entire Crystal Empire disappear and then, when it reappeared, was somehow BEATEN to it by the same pair who defeated the changeling Queen and prevented from entering it long enough for the SAME PONIES to arrive and defeat him as well.
If those two are incompetent, then I'm sorry, but Sombra is just as much since he fell to the same people they did.
He did not. He didn't win thanks to a fluke, and the things that defeated him were the crystal ponies by powering the crystal heart. The main six and Sombra never interacted with each other, so what the hell are you talking about?
Did Hasbro gave us a reason behind Discord's and Chrysalis' incompetence? If the reason was that they were overly confident, that was executed HORRIBLY. They didn't come across as overly confident as much as simply negligent and stupid considering the situation. I don't care about deep character development if incompetent villains is the end result we're getting. No character development in the world can make up for what happened. Discord and Chrysalis are broken beyond repair.
At least Sombra has an excuse for his defeat - he doesn't have wings and there wan't enough time to go anywhere or do anything from where he was standing. Nightmare Moon, Discord and Queen Swisscheeselegs on the other hand - their enemies were right there in front of them. They could have gotten rid of their troubles so easily, especially Discord. But nope, since incompetence was a thing for pre-Season 3 villains, they just stood there allowing their enemies to take all the time they need, do everything they need to do to defeat them.
There's a strong theory that Sombra is the creator of the Alicorn Amulet, and since alicorn magic is revealed to be dark magic, implying that dark magic is more powerful, this makes King Sombra the ultimate user of dark/alicorn magic. Sombra is like the Yin to Celestia's Yang, he's the anti-Celestia. Those are some pretty unique things for an MLP villain.
If Twilight had never found the Crystal Heart, GG. Sombra wins.
If the other five had not kept the crystal ponies calm then they would not have been able to power up the heart. If they all went into mass hysteria and panic over Sombra's return then even having the Crystal Heart would have been moot as they would not have been able to power it up before he stopped them.
As for the excuse of him being a unicorn and unable to fly away to escape danger... he was clearly surfing through the air on a mass of darkness and was even incorporeal for most of it, thus how is that any less incompetent?
This is the first I've ever heard of the theory that he made the alicorn amulet and alicorn magic is actually dark magic... and you said it yourself. It's a theory. That means absolutely nothing because it isn't proven. It would make sense in a way, yes, but speculation is speculation is speculation. It bears no merit on his character as presented in the episode he actually showed up in, which is what this entire discussion is about. Just because Hasbro goes back and fixes their mistakes later does not make them less of a mistake.
Finally, people make mistakes. That's what makes them /real/. Nobody is perfect. Chrysalis and Nightmare Moon screwed up and they paid for it. If everyone did everything perfectly every single time it would be quite boring.
And who knows? Discord let Celestia and Luna turn him to stone that first time. He could very well have another plan in the works, but again, that is speculation and is based off of information we gained later. Discord /has/ had more development than Sombra, I will admit, but his initial debut was much better than Sombra's in my opinion.
...Queen Chrysalis, who didn't get any backstory beyond her statement that she had dreamed of conquering Equestria since she was small. Even Nightmare Moon more or less follows the same basic pattern as King Sombra, with only a few changes - desiring an eternal night got replaced with desiring to enslave the Crystal Ponies, for example.
Why did Sombra want slaves? Because he's evil! That's about the best explanation we get. People don't just enslave an entire kingdom because they woke up one morning and decided it might be a fun thing to do. There has to be a reason for it, but none was given.
Discord and King Sombra, the best villains in MLP.
But this stained-glass window is cool!