Mint or Debian if you need it incredibly easy, Arch if you don't mind putting in a bit of effort for significantly more control, and Gentoo or Linux From Scratch if you want complete control and don't mind waiting forever for things to compile (be prepared for either really long compile times or the need for an extremely powerful gayming PC though).
Linux should be able to do that perfectly or mostly fine at the bare minimum, especially if you're gud with tech or able to get gud easily. About the only things ik well can't work on Linux are games with """anti-cheat""" (legalized rootkits).
Ordinary Windows is just, of course, regular windows, whereas Windows IoT Enterprise LTSC gets updates for a significantly longer amount of time. I also suspect it is slightly less bloated than regular Windows, since it's meant for proper Enterprise setups, and that might actually make it look more legitimate even if you pirate the OS, so it may be easier to create burner accounts (from there: just set your age to 13-15~ on any service, and if necessary use a unique IP address, and you've now avoided phone numbers for burners as well, but Debian is probably fine too for this so it's probably not worth using Windows for this specific purpose).
