Jon Snow from Game of Thrones. Super controversial I know, but as the seasons progressed the more irritated I got with him, especially in season 6 & 7
His the lovable, relatable hero that everyone can't help but love. I get that. But even the greatest heroes have a dark side, more so gray. Book Jon Snow captures this really well, but show Jon...meh. Put it this way, I never would have thought Dany, Arya, Jaime or even Sansa from season 1, would have done what they did to last until season 7. They grew, did good things and terrible or questionable things but they survived and changed. But I could totally see season 1 Jon doing the same things season 7 Jon has done. It just gets a bit repetitive, the hero being the hero to save everyone because his the hero and he can do nothing wrong.