that someone else's experience of your talent was so bad they specifically requested someone else.
But why should people put up with substandard service in any arena? Sure the other teacher may hear about it and be offended, or she may just think, well yes, I'm a lot stricter than they other teacher, and if the kid can't handle it, well good for them.
I would ask OP. You've had experience with this teacher through your first child and are able to see it's not a good fit.
My DC1s first year of school was wasted by a teacher who wrote him off as a trouble maker, and someone she didn't know what to do with or deal with. We had meetings with her and couldn't get to the bottom of it. He HATED going to school. He cried, he begged to go back to his old preschool. We had him at a child therapist to see if there were any issues we were missing.
In hindsight, we should have kicked up more of a fuss with the school and had him moved to another class. He left that school unable to read, write or do any maths. He entered grade 1 in a different school and was so far behind, they principal was very concerned. He had interventions and we ramped up the help at home and nearing the end of Grade 2, is now doing very well. But we still feel very angry at his kinder teacher for making his first year so miserable.
And you know what it all came down to? He couldn't understand a word his teacher said. (School was in french) And even though the school had a program for children from english speaking families to help them with the immersion (we had no choice, as this is how the school board was run), they didn't offer him any help. his teacher didn't realise in a year of school that he didn't understand what was going on. She basically cast him adrift, and he was not the only child in the class she did this to, other parents were just as perplexed as us.
If we had stayed there, I absolutely would have requested that our DC2 did not get anywhere near the classroom of DC1s teacher.