Foxhole is a RPG not a FPS. Not sure how good/bad it is. Post Scriptum looks like it´s straight out of early 2000s. All the games that I have experienced recently that used Unreal Engine had the same issues basically. I don´t think it´s all the devs fault either. What I am talking about is mostly bad looking graphics, clunky movement, bad netcode, bad optimisation/FPS/crashes etc... Battalion 1944, Days of War, ARK, PUBG, none of them make me think that UE4 is a good engine.
Foxhole, an RPG? I need to post this on the official discord server so the people there can have a laugh. It's a massive multiplayer game, not an RPG. You're a cog in the war that can die from the simplest shit just like that and there is no character development.
Anyhow about your examples, the first 2 are basically dead and the other 2 are too much mainstream games to count for anything, PUBG is falling in Fortnite's shadow and Ark isn't as hot after the whole debacle about it's DLC. Of course they're not stupid enough to waste time on the games when they've already made their money off of them.
On the other hand you can't show me another game that does at least 40v40 combat on a large 4x4km map all while having a shit ton of vehicles all beautifully rendered and having awesome sounds. I was in a Tiger multiple times and I can honestly tell you that it's been the most amazing game moment for a while now for me. I sadly can't record it but there are a lot of videos on YouTube of it. And yes, pretty much all of the early access Unreal engine games are unoptimized, it's to be expected, but even after release Unity engime games, like Verdun, still had a shit performance at least until recently. So again you're just bashing unreal for no reason at all so I don't see a point in arguing with you any longer.