Really ? They thrive better than you ?

I hate bursting bubbles, but nope, the other clients don't thrive better in these boundaries better than you do. They are at the same place as you.
You did realize that the situation was unhealthy.

Ex-T has been unprofessional and damaging to you. Not the other way round.

Your feeling needy are the reason you went first in therapy to get better. You didn't get better with that lady, you got worse.
This therapy was not therapy. Setting good boundaries were your ex-T responsibility, not yours. She absolved her responsibilities and blamed you for her mistakes.

Your boundaries are fine.
Ex-T's boundaries were crappy, exploitative and unprofessional. You didn't create it, you can't control it and you cannot cure ex-T's crappy boundaries.