dmesg output from single-user mode:
https://pastebin.com/CiBY22gE.
I can't see any error messages, however I think I have CPU problems, I mean OpenBSD automatically changes my CPU's clock to almost maximum value, it's 4.090 GHz, after the boot issue with OpenBSD after booting into Linux I can see something like "Hardware error" and strange numbers, my CPU clock is at maximum, 4.100 GHz. I always had 2.400 GHz on Linux. Isn't max clock value unsafe BTW?