What kind of issues is he dishing out? Sometimes owners are clueless in fixing problems, but I bet if you take it in hand you'll sort it out.
It isn't my job to train my boarders horses, and some people get really pissy if you do. This particular horse doesn't get along with other horses, tears up my panels, can't go in one of the bigger stalls because there are no shavings, and the owner does not ride her. As far as the horse itself, she is very respectful towards humans and I don't mind having her around. She is just destructive.
I'm sure there's more to this story. Having been on both sides of the issue, I try to be respectful and a 'good guest'. I also try to make sure my horses have good manners and are pleasant to be around. Where I'm at now, it's he barn owner that starts all the drama.
I've never had to deal with that kind of stuff, but my sister has so many stories. They board around 30 horses. Amazingly, they don't have to ask people to leave every often. No fun, I don't envy you. Hope you can figure out something that works and isn't too big a pain in the butt!
I am forever grateful to my boarding barn, because I can honestly say I don't think I'd ever want to board horses at my own barn!
Oh dear, one of those?