The problem is that Big Money entered the Internet... Eternal September just with companies.
I'd say even an entity the size of Google gets dwarfed by the amount of people and money that is out to defeat them. You have everything from scammers looking to find victims for malware, unscrupulous people shilling penis enlargement and other questionably legal/useful/toxic "supplements", to Russian and Chinese propaganda aiming to destabilize our societies, and North Korean and Iranian hackers looking for funds for their nuclear programs.
IMHO the solution is to follow the money and punish bad actors instead of trying to hotfix the effects: get China, NK, Iran and Russia off of the public Internet, sanction Turkey and India until they close down their scam callcenters, and get the domestic helpers of all the criminals (e.g. money mules) arrested. It is completely inexcusable that people like Pierogi of Scammer Payback have to do the job instead of the police tackling all the cybercrime.
Remove the financial incentive for SEO spam and other cybercrime and watch the Internet get better on its own.