galad, on 13 November 2019 - 02:27 AM, said:
("crappy" as in "poor performant", the games gameplay/ideas are often good)
A generalization. You can browse an (incomplete) list of Unity games on Wikipedia and see plenty of games that ran just fine.
I think some of this reputation comes from the fact that historically speaking, Unity lowered the bar for entry into the game market. A smaller less-experienced team could produce a game with it than before, but they don't necessarily have the expertise or manpower to tune the game really well. So there is a grain of truth to it, but its not a rule.
Whereas the bar for entry is higher when teams use a custom game engine or the Unreal engine. So since those teams tend to be larger and more experienced, you are much less likely to see a poorly tuned game from them. Especially if they are putting out a sequel to a beloved franchise, like Batman say, or Borderlands. :-)