This is one of those situations where I feel terrible and don’t know I was being unreasonable, but also think I wasn’t.
Have a train booked for a 4 hour journey. I deliberately booked a seat by the window and at a table. I was running late for the train so by the time I got on it was packed but went to my seat to find a man sitting there. He said it’s his seat but after telling me the seat number, he had at the aisle and I had the window.
He hesitated for a minute before slowly unplugging his laptop, etc then asked if I can seat in the aisle or do I want the window. I said the window.
He then asked if I’m ok. I was a little flustered from rushing for the train but wasn’t upset or anything so said I’m fine. He got up and I went in to my seat.
I booked a window seat because, well I like a window seat. I like being in the corner rather than having people constantly brush past my in the aisle. I also am more comfortable by the window than the aisle. But seeing as the aisle was free (ie his seat), I do feel bad that I made him move when I could have sat there.
YABU - you shouldn’t have made him move, a seat is a seat.
YANBU - you booked a specific seat and he should have easily accepted that.