It’s a used instrument. Fender can’t be responsible for what happens when a bass is in the wild.
It’s disappointing that you took this to a professional who wasn’t able to do this to your satisfaction.
Setting up and instrument is pretty easy, they’ve been designed in a way that makes this possible using some standard tools. I set the action, intonation, and pickup height while my wife cooked some pasta.
Pickups can become stuck sometimes and difficult to move, so worth getting the screwdriver, loosening them off, and then they’re having a wiggle.