So somehow I was able to fuck up all my 3 computers which I have at home.
The one from work where I had debian on tells me it can't boot into Arch.
On my new one I tried to install Windows for gaming which first fucked up everything but I was able to fix that. Windows and Arch booted fine, windows can't find wifi and ethernet, I run an update on arch now the login screen doesn't come up and it can't find any network adapters. But on the arch live CD everything works great.
On my old laptop suddenly no wifi password works anymore even though they are correct. But at least ethernet works so I can try to find sollutions.
This will take a lot of time to fix.