"basically was an Avengers movie"? to me an Avengers movie would be heroes fighting against pretty much just one antagonist; Loki in 1st Avengers, Ultron in 2nd Avengers, Thanos in 3rd & 4th.
in Civil War, there seemed to be more fighting against each other than fighting against any other antagonist. perhaps some fighting against each other in the movies titled Avengers, but seemingly not as much as in Civil War.