I outgrew Spider-Man earlier than other characters simply because he's such a ****ing ******* *****. Instead of patenting some of his inventions and making dough, he dresses up in tights and beats looneys up. Slott did one good thing and tried to fix that with Horizon and Parker Industries, but Status Quo is God and so he's back at square one. I don't know, the whole concept just got stale for me after a while. He's this nerdy guy and he gets bitten by a spider and he turns into a Chad, and then there's "muh responsibility" and "muh nobody dies" and making deals with Satan to save his 100 year old aunt... It's too anime-ish with the MC who's a bit of a slacker, an everyday man and he's got a whole harem of hot girls who wanna suck and **** his Big Spider **** and he's oh, so relatable and whatnot. I feel that the moment you realize that he's a superpowered supergenius the whole "he's just like me" thing flies out of the window, and him not actively trying to fix his life makes him seem like a doofus. The suit is nice, but I generally don't care.
I hear how Batman is not relatable, and I don't get it. At his core, he's just this guy who's devoted to something and tries really, really hard to be the best he can at it. Anyone who's got some big goals can relate to that. Yeah, he's also a supergenius billionaire, but he's supposed to be an inspiration first and foremost; a quasi-power fantasy. Spider-Man touted as the everyday man's superhero, but he's just as much of a power fantasy; just a less cool one. If we wanna talk real relatability, Hal Jordan trumps Parker every day of the week. He's not a supergenius, he has no soap opera problems or whatever else. He wants to do his job, grab a burger and get the girl. He's simple, his troubles are "mundane" and the only thing that changes is the backdrop. Compare that with Parker's Harem, Interdimensional Web Of Destiny, hundreds of brightly coloured supervillains who just do bad things because the plot demands them too, a wacky philosophy and just a trajectory that goes nowhere. It's fine to like Spider-Man and relate to aspects of him, but I don't think he's more relatable than the average superhero. Superman, based just on his personality, is a relatable guy too.
The long and short of it is that "relatability" depends solely on your character. If you're a happy go lucky guy, you'll be drawn to Spider-Man, especially if you're a sort of nerdish type. If you're more of a normie, you'll like Superman. If you're a bit of a loner with some eccentricities, you'll like Batman. After all this time, I've realized that I like the Byronic Hero archetype, so most of my favourite characters fall under that category, and thus I find them relatable too. It's got nothing to do with their origins.