tell me exactly why this 'blockbuster' was good.

Rating: 4/10 (4 May 2019)

To be honest, most of the people i talked to about this movie said that endgame was great, fantastic or incredible. None of these people could have answered the question: "why is this a good movie?".
In the half of the playtime i was bored and already wondering, that they needed another hour and a half to tell the story behind this.
I don' t want to spoiler anything and i'll remain quiet until the movie's airing is completed. But once you have seen it, please try to answer this simple question: "why was this a good movie to you?"