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Complaints about the destruction strike me as odd considering I don't think I've ever read a single similar complaint about The Avengers. They address it with some of Joss Whedon's laziest writing in that awful S.H.I.E.L.D. show but Loki getting a bitch-slap in the new Thor seems to imply leveling a city is just a punchline in the Marvel Universe.
Massive destruction of cities (and with that the deaths of hundreds of thousands, at the very, very least) is an almost paramount component to any alien invasion film. It's the sole reason for seeing the Transformers franchise, any kaiju film, etc. It's just a weird criticism to have. Really, really weird.