Fan's disappointment

I feel like most fans hyped this up to be a movie filled with face huggers, chest busters and xenomorphs. Those fans were a bit to focused on thinking this was a prequel. Ridley said it wasn't a prequel, yet fans continued to deny his words and have their own idea. I think the disappointment stems from this. In all, I felt the movie was very good. Actors were decent, script was choppy at times but average and the plot increased my interest in the alien series (assuming there will be sequels, no sequels and I'm pissed!).