If DS1 hadn't had such an amazing Reception teacher, he would have been a selective mute. No way could I have sent him into his first year of school with a teacher such as the OP mentions.
He's now 16, and some of his GCSE teachers are better than others, but it doesn't matter so much if one subject is weaker....if a 4yo doesn't enjoy Reception, it's going to be miserable all round.
And the OP isn't so concerned about how much progress her child is going to make next year. The issue here isn't that the teacher can't teach phonics, or won't provide exciting maths activities...it's that she isn't a pleasent person.
Who wants to spend all day with someone who isn't particularly nice? Would any of you want to work with a brash, sarcastic person with no sensitivity? They may be great at their job, but they're not going to make your life very pleasent.
OP, there seems to be some sort of culture of you need to suck up what ever you don't like if you chose a state education for your child. He's your child, not the states, and you know what's best for him.
Over the years I've seen so many sensitive children who haven't had their needs respected, which has resulted in behaviour issues. Thankfully the OP's DS is less likely to have such issues, because she's one step ahead of the game, and is super aware of his needs.