I agree with the others about not being subtle, but I know that's hard.
I understand your feelings about the academics. I've been having a lot of trouble focusing and stuff and so T wanted to talk about that, which was fine. But then when she called my ability into question..... It's just a huge part of who I am and I'm first in my class and I study all the time and I'm like "You can't question that it defines me!!!" (in my head only)

Also I feel like she just overanalyzes things. I mention something in passing and she grabs hold of it and tries to wring something out of it but there's nothing there!

Try to be direct, and tell your T that you don't want to talk about the academics. If it's something that makes you feel competent I'm sure your T wouldn't want to undermine that. I hope you work this out