I'm trying to think a current athlete I hate but not coming up with anything. It's probably because I don't really care much about the actual sports any more. No passion. Seems like I'm cheering for everyone roughly half the time.
I remember a few guys from the past that I really enjoyed when they failed. Dale Hunter. Ricky Henderson. Barry Bonds too.
I think there is some definitive answer here that is eluding me. Someone that exemplifies all my sports hatred and I will suddenly think of them and EUREKA!
I have always had a weird dislike of Davis Love III but that's not the big one.