Man of Steel' s fight between superman and zod is destruction porn plain and simple.
Regardless of the damage in either the Avengers or Man of Steel, Man of Steel' s city destruction was far worse. New York wasn't a smoking crater, Metropolis is and that isn't fully supermans fault.
You can't compare this to the Avengers because the chitauri are far less destructive. They used ground forces (and flying worm monsters) while the kryptonians essentially humped the Earth into submission which was what a good chunk of the damage in Metropolis came from. Although superman should have gone after the terraformer in the city first (nice job supes) he was inexperienced and underestimated zod.
Btw the movie wasn't that great either. But it was good enough that Dc is making a sequel, let's hope they get it right when Batman and everyone and there grandmother shows up. Also lets hope this doesn't go the way of Amazing Spider-man.
Man of Steel has potential. Let's hope they don't squander it.