Haiku. It’s a reimplementation of BeOS.
Alternatively, you could use ReactOS and make it look as windows-like as possible, and then go and post on Windows support forums with solutions to problems that work for ReactOS but not for actual Windows, and then play dumb while calling them dumb when it doesn’t work for them.
I use arch btw.


Dickbaskets have an annoying habit of getting into positions of power.