I think you're rational to close the book on something that not only didn't help you rise up, but kept you down, that gaslighted you and said your experience and interpretation was wrong, that reinforced illegitimate power over you instead of helping you connect with your self power and self-mastery.
I've had cbt, ans well as the effects of trauma, and I find it ridiculous that it's so highly rated in studies for overcoming PTSD. There are some good elements to cbt, but trauma is not held nor holding sway in the same parts of the brain as cognition. Cbt didn't heal my trauma, it helped me as one tool of many for analyzing and understanding things, and only in that way was it empowering for me. What serves me to get free from trauma and return to awareness and to my self are EMDR, TAT and EFT, and anything that supports me in understanding abuse, boundaries and learning how to attain self-respect. (If you're interested in tools that have helped me, see my threads on learning boundaries, manipulation tactics, self-respect, assessing relationships, brainwashing, and the abuser's belief system.)
Cbt can be used to say, "You're wrong," or it can help identify self-harming thought patterns (but not the root causes). When it's used to say "You're wrong," it's abusive and disempowering. When it's treated as the be-all end-all and not just one tool that's applicable in a limited amount of situations, it's bullshit, and in every therapeutic setting I've been in where the bullshit (along with meds) had supremacy, there was either a covert or overt tone of control and abuse, to keep one down, not at all to lift them up and help them to get free and experience self-determination.
There are so many other modalities out there. I support your decision to close the books on therapy, and likewise to seek sometime who practices different modalities and who supports you in self-mastery and determining your own path and helping you to achieve if, to serve you and help you become ever more capable to steer your own ship.
I loved all the revelations you shared. You seem to be finding self-respect and awareness. If cbt was keeping you from that, imo it was controlling and abusive, and you've gotten yourself free of it, having gone no contact with it.