Acceptance
For those that don’t know, the morale of Guardians of the Galaxy is acceptance—learning to accept working alongside a crew of diverse creatures from all corners of the universe. We see multiple instances of the group of assorted species learning to cooperate with each other despite their obvious differences.
However, there’s one thing they didn’t learn to tolerate as well: body negativity. In Avengers: Infinity War, the Guardians sing along with The Spinner’s Rubberband Man, a song that makes fun of someone for their excessive weight. In a later scene, we see the group poking fun at Star-Lord for his chubbiness when they pull Thor’s body into their ship.