As a guy who thinks the DnA Guardians run is one of the best runs ever written (I can't give you a ranking), I agree with this.
While the Guardians movies have been entertaining, they aren't my Guardians. They might look like them, but almost everything else is completely different, and not for the better.
Peter Quill is basically Phillip J. Fry from Futurama (don't get me started on the Ego stuff from vol. 2), Gamora seems like anything but the most dangerous woman in the galaxy, Drax's entire character and motivation is different, and Rocket doesn't have an otter for a girlfriend. OK, so that last one isn't that big a deal, but I think you gather my meaning.
While they are entertaining movies, they aren't the Guardians of the Galaxy to me. They're just sitcom characters cosplaying as them.
But that's just me.