I don't think you're overreacting. L says something like it's a normal reaction to an abnormal situation. Something like that. Covid is an abnormal situation in that we have to constantly be afraid of virtual or getting sick. Plus, I think that your T is blaming his family when it is his decision to listen to his family. We all have control of ourselves even if it doesn't mean we like our choices. I'm not saying he's making a good or bad decision, just that it is his choice.

I agree with Zoiecat. Have you considered DBT? Even if you just do the workbook yourself? It seems like you need more skills right now; not relational work. Would Dr. T be willing to do the workbook with you?