Manjaro KDE won’t boot /dev/sdb1: clean,… files,… blocks

I’m sorry to disturb you but could you give a look at my problem when you have some extra time. Nothing seems to help.

What I’ve already tried but it didn’t work:

  1. A guy told me to delete nvidia drivers using mhwd -r pci video-nvidia from a live usb but it only made the resolution of this screen higher

  2. Indian youtubers in their videos tell me to edit GRUB files adding nouveau.modeset=0 or nondestructive but none of this helps

  3. I’ve reinstalled manjaro kde several times choosing either open source drivers or proprietary on the initial screen