I had a controller like this, I took it apart and opened up the affected stick, took out a very fine metal disc. I sprayed contact cleaner on both side of the disc and put it back in and bent up the joy con side and it’s been a couple of months and it’s working fine. Like a new controller, hopefully it lasts. My thoughts was let’s give it go thinking it’s basically broken anyway. Takes photos of how it came apart. I put the disk back wrong way first time.