Endgame was just a wrap-up, but not very satisfying. If one can get beyond the sheer stupidity of Thanos' entire, death-centric plan, one had to sit through the most convoluted time-travel plot in recent film history, which was ironic, since the screenwriters went out of their way to have Banner write off the time travel theories of numerous, famous time travel or sci-fi movies and TV shows.

This was not so much a coherent story as much as it was one scene randomly connected to another, lacking the feeling of high stakes (since in a technical sense, the world post-snap was no longer in danger from Thanos), all to get to yet another series of obviously CG battles. The MCU's one jewel in the crown: Captain America: The Winter Soldier was a film that worked beautifully because characters had a personal investment in the plot, one that posed a believable threat that placed a real sense of dread in the audience (Hydra using a programmed weapons platform to commit mass murder around the world), including the Bucky part of the plot.

That's not to be found here, and the all-too easy way characters jump from one time to another, actually doing what they were warned not to (disturb or change anything) was largely used for laughs, with none of the travelers too concerned with deliberate changes they made. This is most glaring in the following scenes:

- Captain America saying "Heil Hydra" to Sitwell, when in the original timeline, Hydra had not approached or converted Cap to Hydra hence the reason he was considered a threat to be killed by Project Insight as introduced in The Winter Soldier.

- The convenience of present day Nebula's information accessed by past life Nebula (with no logical explanation for that, since her mind is not a linked device transferring information).

- Telegraphing Stark's fate by having Loki disappearing with the Tesseract in 2102, forcing Stark and Rogers to go to 1970, where he can bond with his father.

- More plot convenience of having two people travel to obtain the soul stone; if only Hawkeye or Black Widow travelled there alone, the "rule" of sacrificing someone the seeker loves means what, since the object of a seeker's love could not be themselves, so did that mean the Red Skull would simply refuse access to the stone?

Other issues:

- After the experience of knowing how to build A.I. like Ultron, why didn't Stark use one of his leftover automatons that responds to commands to perform the final snap? Yes, I know Robert Downey, Jr's contract reached its end with this film, but in-story, if he ever believed he would obtain the stones again (and after seeing what they did to the Hulk), why not have an automaton draw the stones to it and perform the snap? The risk of radiation damage would be of no concern at that point.

- Hulk claims that unlike sci-fi movies, they could not go back and change history by doing as Rhodes suggests and kill Thanos as a baby, yet Steve Rogers freely alters history by telling his earlier self that Bucky is alive (something he never had even a hint of in the original timeline until years beyond the events of 2012's Avengers), and of course staying in the past to be with Peggy Carter, when the Agent Carter TV series says she married and had children...and did not mention Steve Rogers. To that end, old Peggy (in The Winter Soldier) spoke as if Steve had been gone for decades.

The plot and wrap-up was not strong at all, namely because everyone knew a "hard" conclusion had to be reached for the actors no longer contracted to Disney. There was distinct lack of an organic cause and effect throughout, and now that most of the original cast have closed the book on their characters, the future of the MCU (with the remaining characters) does no seem nearly as fascinating / promising.