It lacks a fundamental understanding of how the character of Spider-Man functions, why he does what he does, and the personal anchors that make him the character that he is. His supporting cast, which is among the best in comics, was butchered and completely scraped away to be replaced with a knockoff of a Miles Morales character, his core motivation is at best hinted at, instead that focus being shifted onto Iron Man, an irresponsible egocentric futurist alcoholic who got a city blown up and at this point made 7 or 8 supervillains because of his own actions.
Even focusing on trying to be like "Ultimate" is disingenuous, it isnt like Ultimate in the slightest. Ultimate was a retool of the initial concept at the year 2000 to be about a modern teenager dealing with modern problems and a more tightly knit version of the classic mythos, and is full of violence, suffering, death, and turmoil. Spider-Mans core character more or less revolves around two key things:
- Juggling his personal and Superhero life, and the drama that it creates.
- Being independent, to his own detriment.
Spider-Man was among, if not the, very first teenage superheroes. Not a sidekick, his own bonafide man. And his primary motivation is pathological guilt and the sense of responsibility it creates because of his own egocentric actions causing the death of a beloved family member.
MCU Spider-Man has none of the responsibility, none of the tact, lacks the supporting cast and villains of the comic book version. Hell he lacks his own achievements, he constantly needs help and gear from Tony Stark, wanted to be trained by Tony Stark, wanted to be an Avenger. Spider-Man is not that. He's never been that, and all its done in the MCU is undermine his core concepts.
Spider-Man was created to subvert the concept of a teenage sidekick, and now all he is is a teenage sidekick.