The Trouble with Trailers

We all know what trailers are.  When's the last time you saw a really good one, though?  I can't remember.  I'm shocked when I see a trailer that doesn't make me roll my eyes at least once.  Even movies I like have trailers that are stupid.  When I saw TERMINATOR: GENISYS, every single trailer I saw before the film either gave me too much information in the form of spoilers or stupidity, or they gave me not enough information to determine whether or not the movie would be any good at all.  Is there a solution to this problem?  Or is it just really really hard to make a good trailer?