If everything transpired as written, guide sounds like a dick, bad at his job, and I think you're NTA. Guides should keep everyone in the loop during the climb, and everyone well informed of fitness requirements months/weeks before the trip. Then again, maybe they tried and you forgot or blew it off? I tried getting a friend ready for Rainier and he ignored all of the resources I sent him. I realized I had to do a better job checking on someone's progress before the climb and not just assume they're motivated like an independent climber.

That said, guiding is kind of a shit job and they hate the constant laps up Baker, Rainier and probably had some patience wear thin. Doesn't excuse them as guiding is a job about people first, climbing second, but they are humans too.