I used to. Built a couple of garage walls and have had memberships at a couple nice bouldering facilities. I much prefer finding my own bouldering areas outside or road tripping to Bishop, California or random beaches on the US West Coast (beach bouldering is like the greatest thing in the universe).
Ha, dynamic climbing is fun but it's good for beginners to learn to climb statically first. You learn how to use your feet and explore balance in lots of different positions. But that dude does sound like a total douche. Unusual for climbers to have that attitude, you got unlucky I think. Most are really chill and supportive. 6A isn't bad at all for beginning, though that's considered by many to be the "start" of bouldering grades. There are 6A boulders on real stone that would have gym dudes shitting their pants. I was barely into grade 7 on my best days so I don't worry about the grades except as a broad category of like "easy," "possible," "hard," "fuck that shit," etc. The movement is the best thing.
I'm okay with boycotting over skinny ponytail guys though. That's just not cool.