Spider-Verse was a celebration of the worst aspect of any story or character, the soulless commercial brand side of it. It glorified the Spider-Man name, the mask, the logo, the imagery, the merch, the ease of expanding and exploiting the brand, the mass appeal and simplicity of adapting it to pander to any age and race demographic. This was done on three levels, first by referencing Peter doing exactly that with his brand in-story, second, by adapting a multiverse story and characters which are inherently about exploiting the brand (more than half the heroes and villains ended up not mattering in the slightest as if they were only there so toys could be made out of them), and thirdly on a meta-level by having a gigantic cross-promotion campaign and slapping the Spider-Verse logo and Spider-Man's face on shoes, cereal boxes, fast food chains, banks, drawing tablets, cruise ships and other shit totaling $115M worth of cross-promotion, the largest promotion campaign yet.

This movie was celebrating capitalism and the fact Sony owns the Spider-Man rights, everything actually concerning Peter Parker as a character was unimportant and completely botched.
>what was always a story about Peter's personal life is now replaced with dumbass cheap spectacle shit like multiverses which have always been retarded even in the comics
>an alternate Peter dies like a chump in his prime but his replacement deals with the same situation with ease a week into his career
>the "real" Peter is an irresponsible loser slob that can only be straightened out by a ridiculous contrived situation such as seeing multiverse versions of himself
>Peter is supposedly not good enough for the core message he was invented for i.e. "anyone can be a hero" so it needed to be restated with another literally who character (who still uses his name, suit, powers, supporting characters, villains etc)
>the entirety of Peter's hero life and sacrifice is worthless and irrelevant because he can be easily replaced