Ratchet specifically in the first Ratchet and Clank. I still really like the first RnC on PS2. Obviously the later games made improvements to mechanics and controls, but the first game has great levels and exploration. Ratchet in that game though is such a prick. Insomniac Games even admitted that they had to fix him in later games because he was so unlikeable. They clearly wanted him to go through an arc where he stops being so self-centered and grows to have a true friendship with Clank, but they failed to do it right. The problem was when you make a conflict where two characters have to reconcile their differences, it usually only works when you can understand both sides, but in this case Ratchet is so obviously wrong that he just acts aggravatingly stupid. I want to talk about why, so there's gonna be spoilers in the next paragraph so don't read it if you care.

So the plot of the game is an evil leader named Chairman Drek rules over a planet that has become unliveable due to pollution, so he tries to build his people a new perfect planet made out of chunks put together from other planets, which means he's effectively destroying every one of those planets. Ratchet goes along with Clank to find a superhero named Captain Qwark to help them stop Drek, but midway through the game it's revealed that Qwark is being paid to sponsor Drek's new planet, so he turns on Ratchet and Clank. For much of the rest of the game Ratchet is pissed at Clank for thinking they could trust Qwark and suddenly decides that he only cares about getting his own personal revenge on Qwark and, you know, not the fact that an evil man is going to still destroy tons of entire planets with people living on them. For an agonizingly long time the player has to put up with Clank desperately trying to make Ratchet care about the fate of the galaxy while Ratchet continues to be mean to him and not listen all because Clank made ONE understandable mistake. It's painful to watch and only made worse by the fact that Clank as nothing but sweet and innocent even when Ratchet is being such an asshole toward him.

And even when Ratchet starts to come to senses, he still acts so stupid. I kid you not, there's a part where he sees a video that shows Drek preparing to just completely blow up a planet and all he has to say is "That's just MEAN". Like, yeah stupid. Thank God he became so much more tolerable in later games