Didn’t work.
Impossible to reinstall because “snapd is already the newest version (2.57.5+22.04ubuntu0.1)”.
I don’t think it’s worthwhile to go any further. Ever since I gimped Snap and deleted the bloated packages, it has stopped giving “out of disk space” error in PiHole, which was the goal.
I just can’t add or remove anything ever again. And that’s OK.