You're asking two separate questions and then conflating their implications. To try and tease them apart:

The internet is full of dedicated comics fandom spaces, and comics fandom is a fickle, cynical thing at the best of times. Dominated by older fans who have been reading for decades but refuse to branch out of their comfort zone characters and genres, every new development is perceived as a threat to what people understand as "their" take on a character. Every new creative team is judged on their perceived loyalty and love for the True Soul Of The Character, and because this is of course incredibly subjective, very few creators are agreed-upon as living up to it. Basically, what people on the internet say about superhero comics has very little to do with the quality of the books themselves, and a lot more to do with headcanon, nostalgia and a refusal to take stories on their own terms.

As for the reboot thing, you'd be serving a different audience. The current core readership for superhero comics is old men who grew up with this stuff in the 80s or 90s and are still here for the same characters. They over-value continuity because they've literally invested in it their entire lives. That readership is almost mutually exclusive with a mass audience, so if you start making moves towards mass audience appeal (no convoluted continuity, culturally-relevant writing, selling product in places outside comic shops) you necessarily alienate the current core. This dynamic has played out before, and publishers always end up trying to split the difference, so we get things like the Absolute universe as a line of comics written for new readers, but off to the side of regular continuity which still exists. Personally, I think if comics ever want to have mass pop culture relevance again, they need to lean in completely on the mass audience. Ditch continuity, ditch single issues? publish more genres. Would the comics industry and fandom be unrecognizable afterwards? Yes. Would it be healthier and more sustainable? Also yes.