Wants to run a ‘debloated OS’ and asking about Windows 11 installation advice. Wut?? Litteraly no reason to be running Windows nowadays. You can game on GNU/Linux just fine and if you really need something Windows specific you can always run it through Wine (with Bottles for instance) or in a Windows VM (if you have a gaming PC then you 100% have a powerfull enough computer for virtualisation).
tor is an onion proxy software, and tor-browser is a custom version of firefox which uses tor to connect to the web. Usually when people say tor they mean the tor browser but you can actually have any browser use tor (although it’s less safe). You should look into something that can control a headless browser like puppeteer and have the headless browser use the tor SOCKS interface. I don’t actually know if that’s possible, never tried that, but I think that’s where you should be looking.
what you are saying is plain wrong or not explained well. Using tor with javascript enabled you are getting the javascript anonymously, however in the process of running that javascript there is a risk of deanonymisation (for instance, that javascript code could be doing fingerprinting and other bad stuff).
“By using a VPN, aren’t you essentially transferring your accountability to the VPN provider?”. This is true if you aren’t paying for your VPN in an anonimous way, which is why 99% of the “VPN fOr PRiVacY” are scams.