My personal peeves:
Pretentious, War and Peace AW profiles absolutely cluttered with ASCII art, long screeds about what she isn't willing to do, poetry (!), but lacking clear or consistent basic information like price, location, services
Listing things in the Likes (so she appears in searches), but then buried in the endless boilerplate there's some disclaimer about how she only does X, Y, Z for regulars or for an extra £300.
Shitty comms, getting ghosted/forgotten, unsolicited texts days or weeks after the event saying "sorry I missed you, I'm free today though"
Partial or wrong address info, only giving the full address about 60 seconds before your punting time officially starts
Garlicky breath, fishy fanny
Stop-start service
The price!
Very glad to say I have yet to experience outright B&S, short-changing on time, or promised services withheld, but those would all boil my piss too.