Indeed: I made the mistake of taking a guitar to a local shop that many people recommend (and continue to do so) on a local musician's Facebook page. He made a complete mess of a re-fret, damaged the binding as well and a rubbish job of cutting a new bone nut. Unfortunately I was in a rush when I picked it up and this was just before things started closing down in 2020, so it was too late to do anything about it by the time it really sunk in how bad it was. While it was 'only' an Epiphone LP, I'd owned it for years and it was my 30th birthday present. I'd gradually replaced parts as they wore out and apart from the worn frets it was a really nice playing and sounding guitar until he got his hands on it. He knew the sentimental value it had to me as well, but I just think he didn't care, or thought it wasn't worth taking the effort on such a lowly guitar...he still charged me £200 though.I think that's where you're going wrong. You can't assume a technician is a pro just because they're a technician. You can't just assume everybody is a "pro tech". Many aren't. They just think they are. If you're getting a guitar back that sounds like a sitar on multiple strings, THAT AINT NO Pro. No matter how long they've been doing it or how much they charge. If they can't cut a nut, they probably shouldn't be a technician.
I took it to another guy who had previously re-fretted my much loved 1982 JV Squier Strat and he did a perfect job of it. I really don't know why I didn't take it to him first. Anyway, due to the damaged binding and other issues he had it about 6 months, doing as a 'fill in' job between his other work. I knew this going in and he did the job for his regular price, despite the extra work on the binding, etc and un-doing the damage by the shop. It was worth it: I now have an Epiphone Les Paul that plays as well as my Gibson SG Standard (which is pleked). Shame I've now spent more than the cost of the guitar when new on two re-frets.
What erks me now is if I see someone asking for recommendations on the musician's FB group I'm on, I'm always quick to recommend the guy who sorted it out for me. However, there will always be a bunch of people recommending the shop that messed it up for me: One (or maybe two posts) against many and you know how people will vote. Of course I can't say 'don't go there he wrecked my LP' so I have to leave it there. I do wonder how many more guitars he has messed up since though, or maybe he just had a really bad day doing mine. Even so you'd have thought he'd realise it was a bad job and put it right...
I do everything other than fret work on my guitars, so maybe it's something I should learn. However, it's not a job that needs doing often and all my guitars play properly now, so probably I should stick with just regular set up and playing them. At least I know somewhere I can take it to get it done properly.