The biggest OS (I assume you mean largest marketshare or user base) is also the preferred playground for malware creators. I don't want to judge and/or compare the security of Windows vs. Linux vs. MacOS. But because Windows as OS is the preferred target for malware creators I wouldn't choose it as platform for crypto coin activities.

And as data privacy questions are a concern of the OP and as has been said here already that in this respect Windows is really terrible, I wonder why the OP sticks to Windows. You have at least two big arguments to stay away from Windows. (I acknowledge that OP is looking for some better solution with that.)

I prefer to use coinjoins with Sparrow wallet or JoinMarket (I don't care if coinjoins take a longer time; I can separate short-term from long-term coin use; what I want to make more private by coinjoining are rarely coins to be in a hurry with).

The controversy around Wasabi is pretty much heated and somewhat stuck in my opinion. I lack the time and coding knowledge to do my own research and code audit on Wasabi. And as there are alternatives, my choice is to stay away from Wasabi. YMMV...