I don't think it would be possible to come up with THE most hated hawkeye ever, as there are simply too many possibilities. In the early to mid 1980's, we really hated Steve Carfino, a flashy California PG.I think ‘J Bo’ has supplanted Jeff Moe as the most hated Hawkeye ever. And I didn’t think that was possible.
Having said that, I'd probably vote for JorBo because he's just an all-around bad guy. My wife does medical research at University of Iowa Hospitals and has a female scholarship athlete working part-time in the lab; the young lady calls him reprehensible and an embarrassment to the athletic department. Apparently even his contemporaries don't like him...