These messages seem to be harmless:
- [SOLVED] Gdm-password error : gkr-pam daemon control file not found / Applications & Desktop Environments / Arch Linux Forums
- [SOLVED] gkr-pam: unable to locate daemon control file / Newbie Corner / Arch Linux Forums
Regardine this: 
It’s filesystem-related, although I know nothing about BTRFS, I use ext4 and I’m quite happy with it.
All I can do is point you here:
https://unix.stackexchange.com/questions/641173/btrfs-qgroups-warning-error
I’m thinking this
…is because Gnome can’t start.
Please,
Don’t cut things out, as requested here:
Please provide the complete output.
We need to see what’s causing the problem, so it might not be in thee logs you provided, seeing as those errors only look like symptoms of the problem, not the problem itself.