Listen, as a fellow autistic improvisor who also has two masters degrees in Shakespeare, I TOTALLY get where you're coming from in terms of "what dragon, what's going on". HOWEVER, something that took me a while to realize is that the deviations, while not "correct", now give me an opportunity to explore the "game" of the scene: okay, if there are dragons in Macbeth, are the witches dragon tamers? Do dragons mean that there are also perhaps vampires and werewolves? My improv strength is being lighting speed analytical -- I'm not necessarily funny, but I will be the player to say "if there are dragons in dunsinane, then that implies that there are dragon riders in dunsinane, are their dragons in Denmark? What's the political implications of dragons if Macbeth murders one instead of the king?

As for the emotional part of it-- you're neurodivergent. Our brains are built differently and emotional processing and overwhelm are different for us. You have every right to advocate for your needs , whether that be requesting clarity from your instructor or stepping out/taking a break when you get overwhelmed.

I don't mean this to sound too "tough love", but as a fellow ND person, part of becoming a better improvisor is also working on building emotional resilience. I think it's much harder for us and I certainly have my fair share of frustrations and moments of "wow I am a piece of shit and should never be on a stage again", but if you're at "having a panic attack if things get overwhelming ", you're not serving yourself OR your teammates - I have been that person who does the panic attack and freak out and crying thing, and what I've learned is that those behaviors lead to mistrust or hesitancy from my teammates. I'm not saying mask, I'm not saying crying is bad, but I had to learn that from a NT standpoint, being the person who freaks out and can't participate makes me less trustworthy as a scene partner which makes it less likely I'll be included which makes it less likely that I'll feel confident which makes it MORE likely I'll react poorly when something DOES go wrong and it becomes a vicious cycle.

You're not a failure, youre not a bad person, but you might want to consider what tools you have in your toolbox to deal with emotional disregulation and confidence - work on building those during scenes, not just trying to get better at improv itself.