Chekov's costume is the worst but everyone who is not in uniform is dressed horribly. And at least Chekov will be dressed marginally better in nex movie unlike Kirk who gets to wear this monstrosity for another 100+ minutes.Yes...but....Chekov's costume.
Let's be honest, that thing is to good costume design as matter is to antimatter.
(I don't think film is terrible btw)
That greatly reduced the watchability of both movies.