I think one professional denigrating another in front of a client is deeply unprofessional. And her displeasure at your old T's practice has nothing to do with you and you shouldn't be privy to her opinion. And telling you that you need to "deal with it" is a crap attitude. You as the client don't need to deal with anything of that sort. Her opinions are not conducive to your therapy. In fact by voicing her strong opinions she has already harmed the therapeutic alliance between you and her, so how is her practice any better than the last T's at the moment?