This is why we only go to the movies when kids are in school, maybe 3-4 in the afternoon, and after a movie has been in theaters for a month or more (to ensure the hype of a new movie is over). Usually there are no more than ten people in there with us.
Same thing we do. Walked out of 1 or 2, but never thought of complaining or asking for a refund. We're a bit too reserved for that.