Hi I have some experience within this field. I would recommend looking up AtlasOS. Basically its like a "Version" of windows that clean your pc from bloatware, the things that normally makes Windows 11 worse than win 10. Its free to install and there is a guide on the website aswell so it is quite easy to do. I would however recommend that you reset your pc to factory new settings before and then setup and optimized version of windows 11. Otherwise search for Chris Titus Tool which is also a way that you can optimize your pc and remove bloatware, however Chris Titus Tool requires more computer skills but its possible to learn using reddit or just Google in general. Both of these are basically as close as you can come running like a Linux os but with Windows infrastructure.
Sadly Valorant and Riot does intend to make Valorant on Unix based systems since they are easier to work around Vanguard which makes it a security risk and this is a final statement from them. Feel free to ask more questions and I'll try my best and answer them here or on my discord: ObvOssy.