I feel like Guardians of the Galaxy is never quite sure what it is, or what it even wants to be. It's a generic action movie, it's a comedic parody of generic action movies, it's the heartwarming tale of unlikely friendship among space randos and some white guy, but it's not very good at any of those things. If anything, it commits the most to being a space action movie and does a pretty predictable, serviceable take on that idea, but that's what you'd expect from Marvel and that's seemingly why they advertised it primarily as a lighthearted, comedic romp.