I've managed to solved it, the EFI folder was corrupted for some reason, used MacOS to write correctly.
Now I have a new problem, the installer just won't go on, it stuck on 17 minutes remaining, no idea how to get a log if there is one. Big Sur with OpenCore. Used two different DOKs, both getting to 17 minutes and get stuck.
I'm just unlucky this time around, I already had it hackintoshed and it work great. /cry /cry /cry