Winning any PGA event is significant. Guys get in the HOF with 20 victories for their career. The very fact that you so easily dismiss a Bay Hill win for Tiger implies that, even by your own standard, Tiger winning a run-of-the-mill tour event 8 times isn't sufficient to add credence to his legacy. For most players, 8 tour victories in any venue is indicative of a very, very successful career.
Hate on Tiger for cheating on his wife. Hate on him for his red shirts. Hate on him for throwing the occasional club, or an F-bomb. Just acknowledge that you're not objective, because by any objective standard, he's the best in the world, by a pretty significant margin.