Installation of FP Open OS doesn't work on my FP2

I have read of people getting stuck in such a boot loop for several hours.
Some plugged in their phone and let it run/reboot over night, and in some cases that helped.
The phone seems to optimize something, though I cannot really say what it is doing.So this could be worth a trial.

As long as it still boots to some extent, I doesn’t seem to be completely bricked.
Can you still access the recovery mode? You could reinstall the OS from there (maybe just the boot partition is corrupted). If you can’t get into recovery mode, you could still connect it to a computer and try to fix it in fastboot mode.

see also: