Hello Tom256, I have had someone look at the whole of your post now. Unfortunately there is no way to unpick your situation and you need to start from a fresh install.
You can’t have Oracle MySQL and Percona XtraDB Cluster code resident on the same machine, and this may have been the start of your issues here. Hindsight is easy, I know, but if you can spin up a development/test environment somewhere to try things out that would be the best thing to do.
I will refer the documentation / advice about AppArmor to the team for review, to see if there is more clarity we can add there.