It was actually pretty good and enjoyable. But that's it.

Rating: 7/10 (2 May 2019)

The film was overall pretty well shot, but there were some things that made me frown upon.
In the first scene, where Clint loses his family, there is an hand-held shot, presumably, so that we can get the confusing and panic feeling that Barton felt. However, at the end of the scene, we go back to the wide shot used in the start of the scene, kind of dropping what the hand-held shot built up.
Some similar situations were reoccurring throughout the film. Situations where the camera seemed confused, giving different and ambiguous impressions about given scenes.
The battle scene seemed utterly full of grandeur and splendor. It's sense of unity against Thano's tyranny was beautifully constructed to match moving pictures. One of the best CGI I have ever seen. From the tracking-shots following the glove to the shifting perspective each participant in the battle had, I had the feeling I was just enough inside the battle, while retaining the idea that I was only observing, having the conscience to judge the struggle of each and every character.
As for the whole picture affair, I'd say Endgame deserves a good 8/10.

The plot and story, however, didn't feel as good.
First things first, it's something that has affected marvel for the past films. The disturbing likeness of some characters.
I feel like since "Guardians of the galaxy" and "Deadpool", Marvel has adopted the comedy side to super-heroes, as it has been something audiences have enjoyed. And although some characters already had it within their construction (Tony Stark, Peter Quill), some characters didn't.
I always remembered Thor as a character who was serious and traditional, behaving almost like a medieval prince. But since Ragnarok, he feels like a goofball.
I feel like this is not shared by many, but it is something that has bugged me.
Going afoot from here, I also don't feel very comfortable around how Hulk evolved. I always felt like Bruce was a genuinely nice guy, balancing his intelligence and awkwardness. And now he feels like an all-feel-good vegan millennial trying his best at his new job.
It feels like a sudden try to connect with younger generations, bringing odd behaviors through the wrong characters.
Following, there is the issue with all the "time-travel" burp plot.
It all seemed so random, so out of focus and reasoning. I think I understood what went on. But during the film it all looked like it was justified by a "just because".
But a lot of characters just feel rushed and messy. The feel like they lack traits of their own. A significant portion of the plot feels saturated and out of goals. Throughout the middle of the movie I found myself disconnected from it all.
In the end, I'd say the plot and story goes for a 6/10.
Balancing the two, I'd say the film's fine for a 7/10.