I regularly commute on a train for around an hour each way. There are no reserved seats. I have a type of arthritis that makes sitting (or standing!) quite uncomfortable so I try to get one of the limited seats with extra leg room.
I walked the length of the train to find one today and the only one was a window seat with someone already sitting in the aisle. I duly asked the lady in the aisle if it was free and she said yes and stood up. I then took off my coat and got my coffee cup out of my bag and put my bag and coat in the overhead rack. While I did this a bit of a queue of people built up.
When I sat down, the lady muttered “take your time why don’t you”. AIBU to think she was very rude and should sit on the window seat if she doesn’t want to move? When I said that, she responded that I was keeping other people waiting!