> I wonder if it is rarer, or that haters are caused by a reaction to fanboys?

Most ventures fail. Startup ventures fail even more often. If your goal was to be right most often, you would just bet that every new thing would fail. So there's something inherently illogical about being a fanboy about anything. A fanboy is definitely doing more than just looking at the odds and making a rational decision, they are putting their faith in something.

Because a fanboy derives their enthusiasm from more than simple reason and the odds, they become a threat to anyone that eschews emotion and solely uses traditional valuation models. Fanboys are hated not because they believe in a product or idea, but because they ignore tradition.