My brother is a big Chelsea fan (pre-Abramovich) so I guess I have fond memories of watching some of those players from the 90s like Zola, Gudjohnsen, Desailly, Poyet and Deschamps.
Even when Abramovich came in, at least he broke the duopoly that Man U and Arsenal had on the Premier League so I never really hated them.
When I think of teams I detest and wish awful things upon, the following immediately come to mind: PSG, Man City, Man U, Juve, Barca, Real Madrid, Sunderland.