Is there any really impressive unreal4 game?
At this point, Unreal is like a 2010 Civic that some guy started to mod to make it a better car. The car now have very high mileage and it start to rust and need very high maintenance to keep it top shape.
It still possible to make it a good car, but most people will not make all the effort it need to make it run top notch. Most will just do the minimum to make it fast in straight line and mostly watchable.
And most of these people will be better served by buying a new Civic Type R.
Most of these batches of news games are just people trying to make too much with Unreal 4 without taking the time to do all the work it need to run smooth. They would be probably better served if they released their game with Unreal 5 and leveraged tools like Lumens, nanite etc.
To get back to FSR 2.*, that is a bit a thing that might be problematic for AMD. FSR 2.x seems to require a lot of fine tunning to be right. This might explain why some have a much better implementation than others.