It's a dead industry and the people that own actively and knowingly killing it. There's no way to fix it now, especially since Marvel and DC (and parent companies) do not want to fix it. They have their established IPs and killed the industry to the point no one will ever establish any threat to their IP monopoly. They can exploit them for toys, movies and other more lucrative markets than floppy books.

To rebuild the industry is also impossible. They own the publishing and distribution markets. Artists cost too much and you are left with clip paint studio 3d model tracers and tumblr tier artists willing to work for peanuts. You could draw a comic once a month for less than minimum wage, even as the best artist in the business, or you could do some video game concept art and commission work on side for lucrative paydays and a steady, stable job. Even just doing cover work is easier and more lucrative than actually drawing a monthly now. The artist owns nothing and there is no reason to put effort towards designs and concepts and new creations that will be 100% owned by a corporation.

Writers are only there in hopes of getting a netflix/hollywood option down the line and just shit out sitcom tier rehashes and political leftists shit they are told to do. You need to write 3+ books a month to get above poverty level in comics. No one good is going to write shit when they could just go do literally anything, from basic copy at some magazine or newspaper, and make a living wage instead of doing comics they wont own the rights to or receive any royalties.

Add in the fact there are literal blacklists for conservatives and anyone right of Lenin and you have a very insular and incestuous list of creators that only promote themselves and all fucking hate the people that actually read and buy the comics.

If they wanted to rebuild the industry, they would have to try and mimic the manga industry. Marvel could have a Spider-Man Jump and Avengers Jump and 2 or 3 others putting out black and white newsprint versions and collecting them in various trade formats. They could mix them up to 'force' people to buy multiple 'jump' to get all the Spider-Man content, etc, too. Mix in creator owned model where they split some licensing and royalties and with potential Disney+, etc licensing for animated features and so on to incentivize creators to work with them. there is currently no reason to ever produce a spiderman comic for marvel as an artist or writer since you could just make bugman as an indie and make more money while owning the rights even if you sell a fraction of the total comics you would at marvel and tell your own story that way.

CrossGen did something similar to this back in the day and were on their way to being quite successful until all the distributors and publishers conveniently decided to collude against them. They pioneered the direct to trade formats that Marvel and DC are using now. They had creator mentorships and properties and even brought in Jump-like collections in the Forge books (2 or 3 issues of half the line in the book for like $10 lagging behind the trades and current issues by a few months).

This will never happen because they want to preserve IPs. They dont give two shits about sotries or content anymore. They want their copyrights preserved indefinitely and are now 'diversifying' them - why make new characters when you can have 8 spidermen/women that people can associate with the original. Marvel will likely shutdown in few years and be outsourcing their characters to smaller publishers. They already do this to an extent with IDW doing versions of Spider-Man, etc.