With out going into a long debate, I'll just say that I don't agree with you at all. People have different preferences and styles, and they don't all match the teachers. Not all followers want the same thing.If a competent teacher is unable to identify the problems you have then it is unlikely that they are so major to warrant a follower putting you down in the middle of the tanda without an explanation. If you paid attention to basic hygiene, didn't bump her into anyone, and in general there are no clear causes of her acting that way, it is very likely to be pointless to ask for her reasons.
I think a prior post of mine might have confused you. You appear to have made the erroneous assumption that I ask followers what they didn't like about my dancing when getting thank youed. I don't. The only time I really ask for feedback is at a practica (and it's not when getting thank youed).No, the right attitude in a milonga, me thinks, is that a no means no, period. Don't ask for an explanation and don't expect one, you are not there to pressure her into explaining herself and you are not there to be told how much you suck. Do that in the practicas and classes, and leave the milonga for maximizing the fun of dancing.
What I said was that I would prefer for a follower to actually tell me what they didn't like rather than just getting the thank you. I also would like for there to be peace on earth, and to win the next $100,000,000 lottery. Unfortunately, none of these things are likely to happen, and I'm able to live with it.
As you chose to lecture me, I'll return the favor. Reading is fundamental, and it's not wise to make assumptions based on poor reading. Just because someone has a preference, doesn't mean they do anything to make others abide by that preference.