Plenty of great games aren’t janky, those are mostly older games in niche genres.

Fore example, I wouldn’t consider Super Mario World, Doom 2016, or Breath of the Wild to be janky.

Being janky doesn’t mean a game is bad, but it does stop a game from getting a 9 or 10 out of 10 in my book. A game needs to be nearly flawless to get those kinds of scores.