Is it 5 years of practicing on her own? Because if it's anything like in the US, to get licensed, she probably had to have a bunch (like hundreds) of supervised hours and/or internships (depending on what type of degree she has) before that 5 years started. I've mostly seen experienced T's, but with medical doctors, I've found that younger ones can sometimes be better because they're up on the latest research and often more enthustiastic, willing to think outside the box, etc. I imagine it could be the same with T's.

I think you should give her a shot. Let her know you're in the process of leaving your T (tell her the awful thing she just told you) but need help getting out, then would stay with new T. Hopefully she'd be willing to at least give you a couple sessions while she helps you prepare to terminate.