For me it is not irritation, but rather compassion
Post# of 148181
What you mention as your defense, largest investment, is more similar to fear. Your best defense would be to not repeat this experience. Not getting in over you head financially, even if it is just emotional, is a good rule. My largest investment is Amazon specifically because it is reliable. I think my CYDY would only come in around #5 in cost. Neat to think that it could bring returns greater than Amazon in the short run!
You said, "The weight of that causes me to think about it constantly, which in turn makes me question everything. Over and over."
Does this suggest you should step away again? Your call on that.
I do know you have a low enough cost that you can sell some, reduce your exposure. That would be sad for you but better than losing it all. I don't know how you could rationalize the 13D as having your best interest. Their actions speak loudly.
Best to you CD.... LTL