For me it would be a big red flag if the T got insulted because of this. How can you have discussions with this guy if he thinks comments from you "call him into question." This suggests he works from the model, "Me, big educated smart guy; you, know-nothing stupid client; shut up." I think this hints at his own personality problems. Sounds like he has significant insecurities. I would not go back. But as pachy said, what's important is if you feel he can help.