When you talk about the most unlikeable players in the league, Matt Cooke is and always will be one of the first players that come to everyones mind. Known for his dirty hits and causing injuries, the guy was just hated by fans and the league.
Evander Kane has a bit of a reputation and doesn't seem to get along with teammates no matter where he goes (except maybe this year in Edmonton) but in this one rare occasion, everyone in the league was an Evander Kane fan!