People often reminisce about their favourite teacher and when I think back, and I suspect it's the same for many others, my favourite teachers were the ones who made 'me' feel special.
Now, realistically, no teacher can make all the kids feel special all of the time but some have just got that X-factor - 99% of teachers haven't got it - it doesn't mean they shouldn't be teachers.
Some parents are good, many parents are bad and most are probably just okay. Some beat themselves up about their bad parenting, but many don't care one way or the other but they'll happily have a pop at you for not getting their kids to do the things they can't get their kids to do.
Sometimes these things are a sign. Maybe 10 year ago this issue wouldn't have bothered you in the same way. You'd take it in your stride.
I do agree with you that what she did was undermining - especially given you'd already spoken about the same issue before.
But maybe you should be saying the way this is making me feel is going to take a toll on me and I need to not let that happen.
I need to look on this as myself/my body/my senses telling me I need to put my life before all of this nonsense and look to doing something that doesn't make me feel crap.
Like I suggested earlier, I think you'd probably find teaching adults a revelation - people who want to learn and don't play games - it'd be like being able to do what you're paid to do, what you want to do, what you can do.