So you can see that darktable automatically did a backup of your 3.0.2 database when you upgraded the db to 3.3. So, to revert, I suggest you make a complete copy of your ~/.config/darktable directory, then copy the “data.db-pre-3.0.2” to overwrite “data.db”, and “library.db-pre-3.0.2” to overwrite “library.db”. Then when you start darktable 3.2, it should upgrade the DB to 3.2 schema again.
There could also be something funny in your darktablerc file preventing startup, so you may need to rename that file, and you’ll have to set up your preferences again.