I suffered when younger in the work place from those people who say there's a correct way of doing things and you have to do it that way. I've often found I have to develop my own way to overcome difficulties I encounter, so I find myself disadvantaged by following "procedure"
Its the change thing I guess in part. But also if you have a way of doing things that suits your abilities, being told to do it differently can undermine you. It is a pity if they knew you had an ASD they did not consider this when undertaking changes. So perhaps as friends they are no great loss, and maybe there's another drama group you can belong to. True artists they say are difficult to work with.
Unfortunately a response to threat is to over focus on it, with such a set frame of mind that you set out on a course of self destruction. NTs are better equipped to adjust and adapt to what others expect. You may have to remind yourself of previous experiences like this and try to develop some stop phrases that come to mind when you are getting over-focussed and anxious.
The NTs around you were not used to seeing such a reaction, which took no account of their feelings, but where they expected you to adjust when you have an inbuilt difficulty doing so. Knowing you have ASD doesn't prepare NTs as to how to respond.
Keep a notebook. Write down negative experiences, and when you have some quiet time later think them over or discuss them with someone you can trust. With the notebook as a reminder it may make it easier to stop getting over focussed and find a calmer solution.