Have you ever seen such error preventing booting (OPI PC here, legacy kernel)?

[    3.571753] Btrfs loaded
[    4.219189] EXT4-fs (mmcblk0p1): mounted filesystem with writeback data mode. Opts: (null)
[    5.465203] systemd[1]: Failed to determine whether /sys is a mount point: Bad file descriptor
[    5.474926] systemd[1]: Failed to determine whether /proc is a mount point: Bad file descriptor
[    5.484674] systemd[1]: Failed to determine whether /dev is a mount point: Bad file descriptor
[    5.507533] systemd[1]: Freezing execution.

There were power outages, so it may be related. But I've checked fs and it seems to be clear...

 

Try to recreate those mount points, but it's more like systemd bug.

Same problem here using Banana Pro + Arch: systemd-234.11-4 freezes on boot with the above message. I had to rollback to the previous systemd.