The fact, that this is a well known issue, that basically all my friends know about, having it right now, and in the past using various audio output devices themselves, tells me, that it is not a "me problem", but actually something that in general does not work so well in Windows. They have all accepted, that Windows volume mixer simply does this and that there is nothing that they can do. They are not regular GNU/Linux users like I am, so they are stuck with that.
Consider, that you might be in some kind of bubble, with your fortunate experiences. Consider, that maybe you did not understand the problem I am describing well. Since you are talking about "external amplifiers", makes me doubt, that you understand correctly what I am talking about. Note, that I have already stated, that I do not put volume externally to any maximum, like someone claimed earlier. So either you claim, that I am lying, or you do not understand what I wrote.
Perhaps you should rather ask questions about the issue and try to be helpful, instead of going on assuming and pretending the problem does not exist, when it very much does and you simply seem blissfully unaware of it.
I also find your tone quite in conflict with this site's rules. It is quite rude.
This experience is rare, evidenced by the many normal benchmarks and gameplays that exist with this, and similar combos. But other people also experienced it, such as this user:
https://www.reddit.com/r/buildapc/comments/xxrg3h/my_pc_rx_5...
I have since swapped my 5700 xt to a 6600 xt, and the issue went away. The new owner of the 5700 xt is also happy as a clam at high tide. I'd wager that maybe a few hundred of people experienced this at most.