Excuse me, but would you shut the hell up?

Not long before Christmas a very good archery coach - Harry - offered to help me. I took him up on the offer and have seen a continuous improvement in my shooting. All well and good, especially because the not-so-good coach who has been shadowing my footsteps ever since I’ve moved up here backed right off when I told him Harry was helping me now.

( Clearly he was biding his time... )

This leads me to wonder - do you get unwelcome coaches in other sports, mediocre participants who get a certificate and think they have the right to dispense advice whether it's wanted or not? Probably.