The Avengers are a team, yes.
They work together, they suit up and they fight the bad guys, but they all care about each other; they wouldn't have been so successful if they didn't.
So sure, they're a band of super humans, aliens, and specialized assassins, but they're also a great big dysfunctional family, and they have interactions just like every other one.
Side parts to All Those Left Alone - A Marvel Story. You don't necessarily have to read it to understand these, though some chapters may contain references to previous happenings. One thing you need to know before entering this story is that the majority of the MCU heroes are in this one, including the Avengers, the Guardians of the Galaxy, Thor and Loki, and the Wakandans. That's a plot piece from ATLA, but when I refer to the Avengers I refer to the entirety of the team.