My issue is mainly with the attitude of the CSM.
I simply asked if we could be moved too, having clearly witnessed that the F cabin was not closed after all
I asked the CSM if we could move up too, but was flatly denied. I said that was unfair. The CSM gave a variety of reasons and became more vocally aggressive during our 2 minute conversation.
So you simply asked (once) if you could be moved and were told no. That should have been the end of it. Why was there then a 2 minute conversation? What you describe as vocally aggressive I suggest was most likely the CSM becoming more assertive with someone who clearly wasn't going to take no for an answer