A boring film which has well shot action sequences with decent performances, the stand out being Robert Downy Jr but the film fails on pacing and especially the plot. The motivations are clear but there isn't enough conflict for me to think they really have a vendetta against each other.
Also characters such as Ant Man and especially HawkEye were just blatantly forced in. In addition to that Spiderman also felt placed in just for the airport fight which you saw in the trailer, he was there for the fight and then just left, the actor of Spiderman (Tom Holland) was good as Peter but as Spiderman he falls flat and this primarily the scripts fault, they force joke after joke and they all fall flat.
Overall this isn't the worse film ever, has a decent opening with some good action sequences but the plot and pacing lets the film down.