The generations gains haven’t been as great as past generations, but it’s getting silly to claim that GPUs aren’t getting faster for gaming.
Intentionally ignoring frame generation and DLSS up scaling also feels petty. Using those features to get 150-200fps at 4K is actually a very amazing experience, even if the purists turn their noses up at it.
The used GPU market is relatively good at calibrating for relative gaming performance. If new GPUs weren’t actually faster then old GPUs wouldn’t be depreciating much. Yet you can pick up 3000 series GPUs very cheaply right now (except maybe the 3090 which is prized for its large VRAM, though still cheap). Even 4000 series are getting cheap.