Deleted member 33385
What I'd do is first of all, buy a new chain, as the one you have has now been subjected to all kinds of grief and it could well be damaged. They are not expensive to replace and they don't last long anyway.
Then rotate your cranks slowly and see if the front chain ring has been bent. Is it straight and true?
Then check that your derailleur hanger isn't bent. Is the chain line straight, relative to the front chain ring?
Then check the tension of the derailleur adjustment, see if that can be tightened.
Then remove links if the derailleur is already at maximum tension.
Through trial and error, that's what I did with mine (plus change cassette and chain, they were worn, into each other and the chain had stretched). Adjustment was a seemingly endless nightmare, but it all works a treat now! The nylon stay is helpful - you know you've got a lot more adjustment to do if it the chain hops past that, or contacts it too often, wearing it away. I was on the verge of buying a Leckie.
I'll have to adjust all over again when I put the 52T chainwheel back on soon (presently 42T). My legs are a lot stronger than they were when I restarted cyling at end of Dec 2020. I hope to in a few weeks or months, be able to tackle some of the local hills without electrical assistance. The wonderful thing about muscles is that they can become stronger, now matter how old we are.
Remove and replace whatever you must. It's worth being through adjusting the drivechain -your wife would be safer (ignore that last part of the sentence if, like me, you're planning on claiming life insurance millions. The trouble is, I think she's doing the same).