Asking the real questions. If some magic could make a search engine that ignored all SEO spam, life would be better. I find it hard to believe google themselves are having such a hard time with the obvious cloned copies of other sites/content that now own most page 1 results. But they seem to be.

Incentivize SEO for fine granularity (punish blogs that spam too many common keywords) and provide more filtering tools to users.

Former is likely already done for many popular platforms along with many other tricks so you would want to have experienced people for that part.

For filtering tools a good one would be adding a way to have filter lists against spammers and generally just more options to how you want to refine your search. I get that Google Search allows you to type some special keywords but I'd rather it be more user-friendly.

The more something looks like GPT the lower it should be ranked. GPT can make that assessment for you in fact.