Marriage ain't for everyone, and people shouldn't do it just to do it. The right people have to find each other at the right time for it to have any chance at success, and people that aren't willing to sacrifice or compromise for a greater good need not even apply. Even then, it's possible for circumstance beyond a couple's control to tear them apart.
That said, if it's for you, it's great. People shouldn't be swayed against it because a bunch of other people who were never really cut out for it to begin with fail at it.