I was pretty shocked at the passive aggressive behaviour from this child. I didn't think they could bully either. I assume there's some bad modelling going on at home but that's not my problem.

As for teaching DS the skills, obviously I will as much as I can but there's a limit to what a 3 year old should even have to deal with.

And my criticism of the teachers is mainly that they say "oh we're perfect you're overreacting go away" not that I think they are per se bad at their jobs. I can imagine this happens even with fantastic teachers but they need to face up and deal imho by separating the kids for a while to give my DS time to get a bit more mature and recover basically. I think if it was intermittent he would probably be fine but it seems to be every day.