Which antagonist is your least favorite?

Sombra, definitely. What actually annoys me is that he could have made an awesome villain if there were more depths to his character, rather than "Crystaaaaalsss..."

Freaking Gilda! She is an antagonist I will never get over!

I could admit we're I actually hate Discord.. For how cruel his plan against poor little Pinkie was..

I forgive for everything, except that

Sunset Shimmer - How she was insulting Fluttershy and Twilight