Poor Jim always ends up being the fandom's scapegoat/punching bag when they're not happy about something in the show, even though he has little to nothing to do with the actual writing for the show.
Saddest part is that most of the people did it without even knowing the context of what was going on in the finale. At best, they were just going off of a fan translation.
Did this happen because certain fans encountered some spoilers without actually watching the finale, or did they see the finale and not like it? Regardless, it's a dumb move for any kind of show.