Why Miguel O’Hara is not “Spider-Man” and why he might have collapsed the multiverse. Nerd Time.
SPOILERS FOR ACROSS THE SPIDER-VERSE! DUH!
First of all, let me say... if you like him, great. As a character, I like him as well and I can even see why he does some of the things he does. However, the way he treats Miles is wrong and inexcusable.
Now, why do I say he’s isn’t Spider-Man? Well, he is in a way, but not like the others. Miguel isn't bitten by a spider, he's seen injecting the venom in himself, and he seems to need to continue to inject himself with the venom to keep his powers stable, but he doesn’t have everything. For example, he doesn't seem to have a Spider Sense, (or at least this version of him), where’s my proof? When Renaissance Vulture is in Gwen’s dimension, and he tackles Miguel down, and he doesn’t sense it. Not to mention, his webs are different, they’re glowing while the others stuck to white webs, or are natural webs (again see the Renaissance Vulture scene). Peter B even said that Miguel is the only unfunny Spider-Man, and that's what Spider-People are known for, that’s their thing, they're funny. Miguel isn’t. He’s serious. He’s different.
He said to Miles, “you don’t deserve to be Spider-Man” and “you don’t belong”, and it’s projecting. ANYONE can wear the mask, even Miguel. Clearly, he doesn’t feel like Spider-Man, because he’s different... because he got his powers differently, he has different powers... however, the main thing that makes him not Spider-Man, is his treatment of Miles. He’s mean, he’s borderline cruel. He doesn’t believe in trying to save everyone but knowing you can’t yet you still, he believes in you save the bigger picture, no matter what, who cares if a few people die. He’s apart of the Big Boys, he is the Big Guy, he’s in charge, and when Spider-Man becomes apart of the Big Boys, he no longer has time for the Little Guy. He’s no longer Spider-Man...
Now canon... this belief I have is more personal, and more of a theory rather than a fact, I think canon is bullshit! Think about it, for Peter One it was his Aunt not Uncle Ben that said “with great power comes great responsibility”, Gwen became Spidey and now in this universe, her Dad is no longer Captain, he gives it up, in the Miles Morales game Peter Parker doesn't die, Jessica Drew (depending on which version) is brainwashed by Hydra, but in this version, she might not have been. You see what I mean? Canon changes all the time. For example, Peter Parker is Jewish... but MCU Peter doesn't seem to be Jewish. Matt Murdock is Daredevil, but in Gwen's dimension he's Kingpin, etc.
We know that the dimension Miguel entered to take over from his dead self collapsed... that’s why he believes in canon... however, for all we know, when Miguel entered that other dimension, replacing Gabriella's original dad, that caused the dimension to collapse, not the "canon event", but the fact he was in the wrong dimension for a prolonged period of time, and he keeps doing it. Taking Spider's out of their dimension, putting a stop to "canon events" in their dimension by accident or alternating "canon events" (Spider-Gwen's Dad no longer being Captain), and yet those dimensions haven't collapsed... Miles' Dimension hasn't collapsed... Gwen’s hasn’t...
But, what about Pavitr’s dimension? Well, The Spot was there... he was opening up portals to jump dimensions, and we saw what happens when a portal or beam is open for a long period of time to an alternate dimension, the world around the portal glitches. We saw that in Into The Spider-Verse. Yes, Pavitr dimensional string might look different, but that could be because... Pavitr’s canon has changed, and we haven’t seen another dimensional string with changed canon. We’ve just seen “perfect canon timelines”. And as far as we know... nobody else has seen a dimensional collapse, nobody knows exactly what causes it. It’s what Miguel has said, it’s Miguel’s word.
But, that bit is more of a theory! I know that, it’s just a theory! A spider theory! Aaaaand cut!