Windows freezes when booting

Recently, i decided to switch from windows 10 to windows 11. I went with a new C drive too (3rd gen m.2, motherboard mounted), which i made sure was clean before installation. Many problems have developed since.

The system itself is not sluggish, but takes long to start up. When it goes into stand-by mode due to inactivity, it needs a reset in order to register anything again. It also does not immediately detect new drives, only once the system has been reset.

Furthermore, currently the system freezes when starting up. If i choose the C drive, it states it has no operating system. If i choose the boot manager on the same drive, it goes into the automatic system repair tool. otherwise it freezes. From there i went into safe mode, tried repairing it with recommended commands but no internal errors were found to begin with.

This is on a custom build, with a processor that windows 11 does support. I tried resetting BIOS, incase this was a hardware issue instead, but no luck there either.

is it better for me to reinstall windows altogether, or is there a solution i missed?