(more infinity war spoilers)
Oh absolutely Peter Quill makes a mistake in this movie by allowing rage to overtake him at the last possible moment, but he doesn’t really make any more mistakes than any other MCU hero made in this movie/the leadup to it. And what happened might well have happened anyway without him making said mistake? So no, he’s not the other villain of the movie, AV Club! Jeez! And also a slight ‘ugh’.