Bad things compared to what? Unity which does not have half the features out of the box and every other game implements basics like FPS limiter wrong? Frostbit

Bad things compared to what? Unity which does not have half the features out of the box and every other game implements basics like FPS limiter wrong? Frostbite or Dawn Engine with its bad editors and performance problems? Crytek used by few games? (This one has a chance to challenge UE) Unigine which is also rather rare?