The game runs like shit because for some reason the developer elected to have the game compile shaders in real-time as you're playing instead of choosing to pre-compile the shaders. So you'll notice that shadows, reflections, motions, lights etc etc will be loading in as you play. Shader compilation is a very CPU intensive process and UE4, as well as UE5, has a real big problem with shader compilation stutter. This issue has nothing to do with GPU's and is entirely a CPU bound issue. Should also be noted that the developer is using UE 5.2 which might be adding to the problem. UE 5.2 isn't officially released yet so this recent build of the game is using a developer preview of UE 5.2
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