I agree. With my old PC of i7-10700 and RTX 4060 Ti (16GB) for hyperion i was at benchmark 12.58 fps and 11fps real-life performance.
With my new 285K and 5090RTX i am at benchmark 22.99 fps and real-life 17fps.
I have no idea why and was definitely expecting way bigger jump or improvement. 
(to add an insult to injury, i am even slower than most people here with similar setup and i doubt its just my choice of GPU silent BIOS, shoudnt make such a huge difference anyway)
