I'd say I don't like how nothing is spelled like it sounds and words' spellings are so arbitrary, but if the language were made totally uniform it would probably be ugly af.

Also I don't like how there's no "themself"/"theirself" so you have to say "themselves" even when it's singular. Or how there's no gender-neutral third-person singular pronoun, so you have to use "they" which is plural. I think some words to fill in this role have been proposed, but they all sound retarded to me.