Very odd behavior, and I still don't understand why he kept saying he didn't want to argue. Was there an argument before around your arriving early? And are we talking 10 - 15 minutes early or 30-60 minutes? If it's the former and you take a bus, I don't see you having much control over being a few minutes early, or late for that matter. Regardless he handled himself very poorly and unprofessionally.

I'm training to be a T and may someday have a home office, so I understand the need for boundaries. That said, I think that is the T's responsibility to figure out and work out the logistics of, not the client's. I've seen providers in the past who have worked out of their homes and both had some kind of waiting area for clients who show up early. If your T can't manage this than he should rent out space, join a practice or figure something else out. I'm sorry he treated you that way, I think it's really unprofessional and unkind and certainly warrents a conversation. If he can't handle that it might be worth considering firing him.