I think the reason people are so harsh on Jasper is that she's never shown any redeeming qualities or truly had any good moments of sympathy. It also doesn't help in that she's the only gem seen thus far that actually seems to enjoy inflicting pain on others. And speaking of jerks, am I the only one shocked that Ronaldo was not just tolerable, not just funny, but legitimately sympathetic in the latest episode? It's almost like they rent conned his character.
I understand why people are skeptical of a redemption arc, but I see people who are saying that they will get upset if she got redeemed or that she can’t be redeemed. That is a bit silly. This is coming from somebody who didn’t want the Peridemtion arc until it happened (I thought Peridot would be a redundant presence because she was too similar to Pearl, boy was I wrong).
As for the Ronaldo stuff. I was shocked that the episode made me feel really bad for him. Though if any character felt like they got retconned it was Steven. Steven is all about love and schmaltz so him not caring about ruining Ronaldo’s relationship felt really out of character for him. That’s probably why it bugged me way more than what he did in New Lars (his actions in that episode, while bad, was still arguably in character).