The quote you highlighted was paraphrased from Eleanor Roosevelt:
“No one can make you feel inferior without your consent.” ~Eleanor Roosevelt.
So, you know, I’d suggest your argument is with Eleanor, whom I trust in this area more than I do you. It is a quote of empowerment. You have ultimate control of your own feelings.
If you find yourself excusing people who abuse you emotionally; if even in your own inner monologue, you accept this behavior and don’t call it out as Not OK, this is an issue that requires therapy.
I neither apologize for that statement, nor do I view it as condescending.