Coaches bear the brunt of everyone's emotions during the entire year. If a coach's team did well, the fanbase loves him. If not, then there are constant murmurings from January to August (or longer if the season was truly horrible).
For the exceptionally successful teams, hatred follows the success. Winning repeated national championships or top-tier bowls elicits strong feelings from all the teams who aren't seeing the same type of success. If the successful team is in the same conference or division as the also-ran, then the hatred is magnified.
Regardless of whether these coaches drew internal or external hatred, these are the 10 most despised coaches in college football history.