Forky pig.....
Get over yourself you baby. I sat on a plane next to a guy who mustuh weighed 340#’s.
Thankfully there was no one in the isle seat at take off, so I sidled over into the isle seat and we were both comfortable and happy.
He thought he was going to spend two hours pressing himself into the chassis of the plane so I wouldn’t be uncomfortable.
Told him not to worry. God fixed it for us. Spread out and relax. Real nice guy too.
From your post you didn’t set next to him as you state. You sat seat away from him, as the seat next to him was full of “him”. You rather make the point that the very large should pay for two seats.
God is not providing a lot of empty seats for air passengers these days.