You'd think James Gunn would understand what was good about the first two movies, but... This was grim, unfunny, needlessly violent, and way too long. The characters spent half of their screentime just screaming miserably, and the villain did nothing else. As with "Black Widow," I got the sense that the writers lost track of what makes a hero. We see a whole planet full of sentient beings annihilated and it's hardly discussed. Superheroes are supposed to prevent things like that, or at least be upset that they failed to.
I don't know that I've ever enjoyed a Marvel movie less.
Good needle-drops, though.