yes krazibean, based on what you just said - yes. Learning to be ok with yourself when others are frustrated is an important lesson, and a bigger one is to learn that people can be frustrated with you and not abandon you or stop caring. My T says " the foundation hasn't changed." You can use the tension, gently, to learn why you try to push her away, knowingly or not, through being critical. It's not wrong on your part.. it's what you know.
From what you described this sounds more like a chance for a powerful change for you, more than a time to switch to another T. If you could be certain right down to your little toe that she cared and would never leave you... no matter what... how would you talk to her about this?
The critical stuff... examine it.. take it apart.. ask if it is really about her, or about you, or about something else entirely. When i am stressed I will focus on a small thing instead of grasping the larger problem. Enough of that can lead a T astray. We've done it.. several times, because I am so convincing in my rambling about whatever i think T is wrong about. So, if you had to ask yourself where this might be coming from, what does your gut tell you?
being unbalanced with T is awful.. i HATE that.. but for myself i know i often learn a lot then too