Are the plenty TV spots and trailers for the upcoming Avengers movie kind of making you feel like the movie is being spoiled?

I refuse to watch anymore new TV spots or trailers. Feel that they are showing us too much in my opinion.

I agree. Trailers in general tend to show too much these days. All they should really be doing is telling us what the movie is about, what kind of movie it is, who made it, and when/whereabouts it's coming out.

They should really not be so numerous and long, and show so much of the story.

Yes. Especially considering if they release three of four trailers how scrutinized they are on the internet, you can kind of discern the direction of the story and where it ends up.