I think I suggested this to you in the past (maybe over PM), but I think you should look into quality assurance/quality control jobs. That’s what I do - I work at a plastic factory, collect samples from the production lines, run tests on them, and release good material for shipping or reject bad material. It pays decent, doesn’t require any special degrees or certifications (at least my factory doesn’t), and you never have to deal with customers, just a few coworkers. And you get to yell at people when they insist their product is good but it isn’t and you need to shut down their line.

Most places like this hire through staffing agencies I think, but you can find some job postings online I’m sure. Doesn’t need to be the same industry I’m in, either - lots of manufacturing and assembly type places need quality control techs.

Worth looking into IMO.