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.
(Book one)
When Anna Smith enrolled in the army, she was best friends with Bucky Barnes and Steve Rogers. She left them to follow a dream of becoming an agent. But when both died, she made the decision to become the next super soldier. Years pass as she established herself as the Director of SHIELD and remade the intelligence community in her image. Now that she finds out Steve is alive she wonders if he will remember her. Will they be the same, or will their friendship change? Not only has SHIELD slowly become something Anna doesn't recognize, she has to deal with the attack on New York too.
I do not own any of the Marvel characters. I did go along with some of the movies. I do have my own characters in the story.
2nd Book- Don't Forget Me
3rd Book- Don't Lose Sight Of Me