For some reason I've just never liked Spider-Man. He comes off as a whiney, ignorant child that never seems to grow up or mature despite everything he goes through. I love a good coming of age story, but he just never seems to become an adult.
I have to assume you've only seen the Spider-Man movies of recent years and not the comics, the original live action show, or the 90's animated series.
All of those go well into Peter Parker's adult years and he's a much more likeable character. I don't particularly like what they have done to him in the modern stuff (outside of Spiderverse since Miles is a totally different person anyway). It doesn't help that it's been rebooted 3 times so all they've shown is his origin story a bunch of times. I can't stand modern Spidey, either. And it's extra infuriating because Spider-Man is my favorite.
I'm starting to think maybe we just related to the whiney teenager more when we were one, (looking at you 90s TV show) but experiencing him as a jaded adult just doesn't hit the same.