I think the attitude of the FA was uncalled for. If she had complaints from other pax, she should have said so and negiated a compromise using a quiet tone of voice.

I much appreciate the demeanor and attitude of BA flight attendants who speak so very quietly but can be understood easily.

After all, you paid for your ticket also!

As far as who 'owns' the window, I feel that the person closest to it has the majority opinion--subject to civil compromise.

Civility, where has it gone?