Not as in hateful but definitely contemptible. He has a very high opinion of himself yet he's a complete freeloader with no discernible talent whatsoever.

He wastes every opportunity he gets to improve himself or his circumstances (including relationships with some very attractive women) and shamelessly exploits and manipulates the people around him - notably Mark but also many others - rarely saying thank you for their generosity or apologising for his misdeeds.

He may not be evil but I think you could say a lot worse about Jeremy than calling him a selfish moral blank whose lazy cynicism and sneering ironic take on the world encapsulates everything wrong with a generation.