I agree with TDale313. I am sure the OP is telling the truth. It's often difficult to say something, especially the first time something happens. After one has processed what has happened, if something similar happens again, one might respond more assertively. But it's unreasonable to expect perfection from a human being and excoriate them for not having responded in the perfect way that is so easy to come up with when one is sitting at one's keyboard, taking as much time as one needs to think about the best way to respond to the situation.