I felt very similarly during lockdown and again after May 2022, when my main band went on an extended hiatus for various health/other reasons (not me, for clarity). I have reinvigorated myself - and started buying/selling basses again, haha - by joining a band from a different genre that I am used to (goth/post punk) but which I have fond memories of from my youth. Found them on "Joinmyband" website. Maybe a short break is in order and then check out the 'musician wanted' sites and try something a little different, Andy?