Red
I am so sorry to hear what this woman is putting you through. I know why she is doing it too. She is to be pitied but not put up with. You paid for this class. I know you, you are too sensitive, just the type of person she likes to dump on so she can drop her anxiety. She has to do this subconsciously or explode. The chances of shutting her up are slim.
This is second hand anxiety and you are dealing well with it considering how corrosive it is. And I'm glad you posted and shared. There is really only one way to deal with this other than removing the irritant, which you can't. And that is second hand positivity. Pass on a happy feeling or comment every time you can. Don't get dragged into the negative conversation. When she is looking for confirmation, just say Gee that's too bad and change the conversation to something happy. People mimmic when there minds are elsewhere and get dragged into negative conversations. Problem is she is not there for the learning experience, she is there for her anxiety.
You have friends here, so come here each day and let it out no matter how long the post or negative. You are our "Red" and you are special. Do not hold it in. it will build up.
This is called passive/aggressive. and needs to be replaced with assertive right at the beginning. Not mad or aggressive but not taking any bull either. It is hard to do with out drifting into mad but I think you can do it. I used to be very P/A. Now look at me.
I like sunny's Ideas. Your instructor is busy and may not notice what is happening around her.
You have an excellent opportunity to develop coping skills here and pass them on to us. You are not alone we are with you.
Your friend
Davit