The Web would have been dead no matter what Google did. Its death was as inevitable as any human's - just a matter of which organs fail, in what order, and when.
If there's one thing we can learn from all this, it's that decentralization of a network is best understood as a temporary process for electing the monopoly node(s).
The Web is not dead yet, and its death is not inevitable. It has been under attack since at least the days of America Online, and it survived that. Google's market share with the browser (all Chromium-based browsers) puts them in a position where they might succeed in destroying it this time. I wouldn't give up completely just yet. People need to speak up, including Google employees. Other companies like Automattic and Cloudflare need to stop enabling schemes like AMP. Large content publishers should say "no" to AMP, because it is not in their long-term best interests. A visit to a restricted shell of your content on someone else's AMP server/cache is not a real visit to your website.
If there's one thing we can learn from all this, it's that decentralization of a network is best understood as a temporary process for electing the monopoly node(s).