https://www.cnet.com/news/avengers-endgame-review-marvels-love-letter-to-fans-tops-infinity-war/

The shift in focus brings a change in tone, marked by the camaraderie between Captain America (Chris Evans), Iron Man (Robert Downey Jr.), Black Widow (Scarlett Johansson) and the rest of the heroes who headlined 2012's The Avengers. The villain-focused Infinity War was dark and deadly. With the likes of Brie Larson's Captain Marvel and Paul Rudd's Ant-Man on board, this one goes lighter as it turns toward the heroes with plenty of humor and even some absurdity mixed in among the heartbreak and dizzying action sequences.  

Endgame is the end of an era for the Marvel Cinematic Universe, and it serves as a giant sequel to every MCU movie ever. Thankfully an in-depth knowledge of all 22 earlier films isn't essential. The plot does jump around at times, which might confuse casual viewers, but bottom line: This thrill ride kicks off big and never lets up. It's so much fun.