I know almost nothing about critical race theory. So I can't personally vouch for or against it. But if you want to know some of the legitimate concerns people have with it, so you can better refute their points, I recommend watching this video: https://youtu.be/S5Ak5uEcDUQ .
From what I remeber the main criticism is that it focusses too much on the little things and primes you to always assume the worst. I don't know how true that is though, because CRT isn't really a thing where I'm from.