Haha, sorry if I came out a bit strong in my previous comment. I daily drive Linux on all the machines I game on and I do want to see Wayland succeed, especially in the gaming space. This is why I find the merge request I linked to in the main post (I am OP btw) so exciting! And we do already see Wayland working really well on the Steam Deck due to Valve putting in some extra magic sauce (like the aforementioned tearing support), so I have no doubt that Wayland will get there on desktop eventually.

my GPU is a 6800XT

This makes me wonder whether the input latency issues are more noticeable on lower-end cards running at lower framerates. It makes sense that that could be the case. A 6800XT might be brute forcing through some of the inefficiencies that would otherwise be visible on a dinky little APU like my Radeon 680M. You also have a pretty beefy CPU, so I am also wondering whether that has an effect on how certain Wayland compositors deliver frames. For example, in Valheim, it isn’t just simple input latency issues, the frame delivery is actually worse somehow, with visible stuttering.