Your sound probably down to your sound drivers not being up to date or a BIOS issue that was corrected in an update. Windows 11 is deeper ingrained within the UEFI system etc for starters.
As for the twitch "pro" gamers, well that's their preference I suppose? Or it's perception? Win11 wasn't exactly favoured around launch for a while for various reasons and just like Vista, once a bad rep, the stigma sticks for ages...
Actual tech houses who review compare gaming under both OSes have time and time again shown virtually no difference in games that don't use any special tech that prefers Windows 11 (aka advanced DX12 features etc).
You don't need to listen to twitch gamers on this matter, you only need to do a quick search and watch or read a few reviews from reputable sites and channels, of which there are plenty.