I've worked on Frostbite a bit and like a lot of things about it too, but I think you're falling victim to motivated reasoning here. Star Wars Squadrons got a lot of flak for being "unoptimized" in VR as well (despite it being yet another case of people just comparing to games with baked lighting and not understanding the costs of dynamic lighting... sound familiar?). Together that list represents a lot of the games on Frostbite in recent history... what "majority" of other games are you thinking of? NFS (not sure those are going to be a good example for you)? The sports games? :S
Frostbite also got a lot of flak for DX12 being slower than DX11 (despite being one of the major drivers of low overhead APIs) in every game that supported both until they dropped DX11 and made further comparisons impossible. (
example )
Ultimately it's fine to look at patterns to some extent, but your phrasing betrays the narrative that you are fitting everything into at this point: obviously not *all* UE4 games had the same issues. Several were mentioned in this very thread that have been great. I'll add Satisfactory (also recently updated to UE5) and Chivalry 2 to the list, but there are plenty more especially if you go back a bit to similar time periods as those Frostbite games (several good Borderlands, Batman, Biosock, Darksiders, Mass Effect, etc. games). And those are just the popular ones I played off the top of my head... there are hundreds more (
https://en.wikipedia.org/wiki/Category:Unreal_Engine_games) many of which didn't exhibit any of the problems you are concerned about here. Are you just going to call those games the "outliers", but then reverse that logic for non-UE games?
(And yeah I'm aware you can go and find a reddit thread bitching about literally any game ever, but I think it's fair to say broadly that if you apply the same criteria between different games the ones I've listed - and many others - would fall on the upper end of technically sound releases.)
I'm gonna be honest, I don't think this discussion is very productive. Everyone is just going to have their own biases and motivated reasoning, myself included. If the discussion is really to be about the games and not caring what engine they use, great. If we want to talk about engines let's stick to the tech and keep the sweeping generalizations out of it IMO.