I despise what they did with Hans

I usually love villains as villains, but him becoming the bad guy felt so forced and rushed, especially when there's multiple scenes that aren't just misdirects but make 0 sense if he did have ulterior motives. (Why did he smile at Anna when nobody was around? That was a "wow I really like that girl" smile, not a "wow I cannot wait to murder her sister and steal her kingdom" smile.)

If I was writing Frozen, I would've made Kristoff a grumpy old dude and more of a father figure to Anna because her real dad was so focused on Elsa (glass child syndrome.) Then Hans would have kissed Anna in the third act and been a good guy, but then it doesn't work and we do the whole thing where Elsa actually saves her and the movie ends with Anna and Hans agreeing to take their time with each other and also agreeing to either go on their first date or to keep in touch with letters if he has to return back to his kingdom.

I'm not like a big Anna X Hans shipper or anything, I just think the movie falls off real bad with him as the villain instead of just focusing on Elsa's emotional problems and others believing she's evil because of them, randomly throwing in a usurper guy was so unnecessary