I think that Tingle is just one of those characters that people love to hate.
While I don't really hate him, exactly, I can see where the people who do are coming from. I always thought he was annoying when playing through the games – especially in The Wind Waker. And that was when I was too young to realize he was using slave labor and had dug a hole to hide a pictobox in a room with skulls.
The real thing about Tingle is that he's just such an outrageous character that it's simple to joke about hating him. Whenever someone talks about how annoying Tingle is, it's easy for me to relate, haha. It's not difficult at all to make fun of him and make him the subject of hatred.
Does that make sense at all? I don't hate him, but he's kind of just a joke character for me – I will occasionally refer to him in mockingly horrified or hating way.