This movie criticizes other movies where time travel is involved to say that what they have done is the only solution which is not cool.
They took all the infinity stones from the past and then used it in the future to kill thanos and then returned it back to their respective timelines so that there won't be any change occuring in the future.
If that is the case with stones then a similar problem occurs when thanos travels to the future and doesn't return.
Now about loki, loki escape with the space stone after avengers 1 and this should create a new path for the future.
Captain America encounters captian America is worst part in the film. If captian America is influenced by the loki septre there is a change in the future. And stark tower don't have CCTV camera and security guards to watch what happens that to while transferring a notorious villain.
About Captain America lifting the hammer which was supercool and after two hits he strikes thanos with a lightening bolt. Some are saying Captain will have the power of Thor. If that's the case then Captain America will not age fast. And he will be the next king of Asgard. How can there be two God of "hammer's".
And about the climax where ironman snaps all the others who held even one of the infinity stone they just burst to death but iron man was given time to say goodbye and he has a normal death. Or there can be another ending where all the heroes share the power of the stone and kill thanos like in guardians of the galaxy 1.
What if thanos just slaughtered half the universe by his own hand without infinity stones then they just move own? It's really bad that they didn't save all the people who were killed by thanos. They just saved the people who were victims to the snap.
How did the Asgardians reach Earth?
If carol danver is covering lots of other planet why didn't she know the activity of thanos?
Do carol danver needs oxygen for metabolic activities?
For making an infinity gauntlet was so easy for a human being then what role did etri the dwarf perform? And why was there a fake gauntlet in Odin's vault?
And there are several unanswered questions and lot of plot holes in this film.
About the good stuffs every character in this film make their contribution for killing thanos which is really great.
First impressions on the film was supercool. But when I went home and thought about the plot the movie is not good.