You're confused the 2nd movie terrible, the 1st is good. It not Amazing but I can see it being in a lot of people's top 3 Spider-man movie. It sets up a ton and of story elements and ties it all up. It's highly efficient storytelling.
Miles and shlubby Peter both get a character arc, even if Peter's is small. It doesn't fall into the pitfall of giving anymore backstory for the villains or Heroes then is needed(Spider-man3/Amazing2). It fleshes Miles backstory, Blonde Peter intro doubles as a juxtaposition of Shlubby Peter's intro showing his life going to shit as he got older. Gwen gets a shorter intro and 2 scenes that double as showing Miles struggling to adjust to the new school and then powers, because that's all she needs. the 3 other Spider-people get even less cuz there just there to pad out the roster and comic relief, it give a motivation for kingpin but, what is Goblin, Ock, Scorpion,Tombstone and Prowler origin story? It doesn't matter, they're Kingpin's goons. Blonde Peter and Arin get just enough screen time that both their death has some weight to it.
My only complaint is it has the same problem as Ironman 3, not a lot of time is spent properly suited up in costume until the movie blows it load in the final act. but the sweatpants Spider-man is fun and the terrible Halloween costume works thematically.
If you don't like Miles or Shlubby Peter as characters you're not gonna like the movie but that doesn't make it a bad movie.