There's just so many characters whose entire presence makes me go "please shut the fuck up" that it's hard to pick just one. Like yeah pretty much anybody would sell Preston Garvey to Satan for half a donut, but there are just so many other annoying characters...
Legend of Dragoon. The game where a main character dies and is immediately replaced with an off brand of himself, and that includes a boss rush mid game that is unavoidable and punishes you for trying to use the game's signature mechanic.
Wait, they finally got around to explaining what the veil was? What was it?
And yeah I 100% percent wish we had gotten poison instead of janky parkour. (I will admit that baiting the Sorrow Bearer into lunging off the map with Strand jumps was fun though.)
The writing was bad. I played through the campaign four times (three normal, one ... whatever the hell hard mode was called) and I still have no idea what "the Veil" even is, why we cared about it, why we did literally anything that we did, etc.
The new Darkness element was fun but the way it was introduced made it REALLY OBVIOUS it was supposed to be in Witch Queen and just got delayed.
Game balance went out the window, to the point where people were getting one-shot mapped by Cabal rocket launchers in patrol zones.
They introduced a new raid that, while thematically fun and visually gorgeous, was un-fun to play.
Eh... the more I Think about it the more everything Chozo said covers it more eloquently.
Edit: I don't remember if it was with Lightfall or Witch Queen but they managed to make Gambit worse. Gambit was already neglected and damn near unplayable. They made it worse.