Kind of what I was thinking. I think if I want to be charitable he's not saying he can't write at all, or even that he can't write capeshit, but that he can't write from the optimistic perspective that these larger than life symbols can inspire us to do good and be better versions of ourselves. IE: Alan Moore was right all along (what a shock).
What's sad is that it almost seems like his immediate instinct is that he has to phone in and fake that optimism because that's the limits of the genre he's working in. Personally I hope he does some soul searching and realizes that a cynical turn for his voice is entirely acceptable and not necessarily a decline.
For what it's worth: I think most of those people are also crushingly lonely and alienated...because those things are due to material conditions more than what you've read.
Reading tons of shit and educating yourself doesn't make you any more lonely and alienated so much as it helps you correctly diagnose and identify the source of those things. Also doesn't give you any sort of special power/ability to fix it on your own though.