I took this idea from the Top 5 Most Loved Teams but I'm not putting a cap on your hateness just state your most hated teams with a brief explanation.
New York Yankees - I hate them with guts I can't stand watching them. I believe my death will be getting a heart attack watching them. Go hide in a bunker gutless Yankees!!!
Rubentus - Who in their right mind doesn't hate these cheating bastard? Go to Serie B thats where you came from!!!
Farcelona - When they win all you hear is "Football has won today" ignoring the fact that the ref blew a huge penalty that turned the game around. They are a bunch of cheaters and divers and anybody who says different can go F themselves!!!
Spanish National team - An overrated bunch of hacks acting like they play beautiful football while passing the ball from side-to-side, they got lucky in the WC and even more lucky in the final. I would rather watch catenaccio all day than this crap. Also win 4 more World Cups or at least tie with Italy before you pound you chest as if you are at that level. Go hide in the hole you came from!!!
New York Jets - I don't follow much of the NFL until the playoffs but these hacks can't shut up about how great they are then get man handled by the Patriots and Giants not to mention that they haven't won in ages. Eat some humble pie then pull your head out of your own a$$!!!!!
I don't hate English teams I mostly hate their media building their teams as unbeatable then getting trolled hard by opponents.
Maybe somebody will come and say that they hate Inter? Some like RuBe.