Yup, I upgraded from a Phenom II X6 1055T to my 1800X, OC'd it to 4.1Ghz, that made a bit of a difference, mostly in terms of stabilizing my framerate, since the Phenom is indeed an... old cpu, you could say, not the greatest single-threaded performance on that thing.
The GPU upgrade, from a damn HD 6950, back from 2010, on it's last legs, all the way to an OC'd Vega 64 Liquid Edition. Not a single difference in FPS nor general stability.
I've also played the game on a PC with an i7 7700 (non K) and a GTX 1080, pretty much the same framerate, struggling to reach 140, usually in the 100 range.
Something is very, very off.
Not to mention that, I've spoken to a few who achieve much higher framerates. It seems to come down to luck, or something like that. Some random guy in my game on an RX 480, I think it was, and presumably on a mid - high tier CPU from the same generation, never asked him so can't be sure, was somehow getting a stable 300+ FPS all the time.
Also, I should add, changing in game settings doesn't do jack shit to help you. Literally going from everything at max settings to lowest of lowest, get ready for it!
Resulted in a lower framerate for me and my friends when we tried it recently.
WHAT?