This would have been a crazy idea that I (would have) like to see happen. The fact that we're talking about Reddit content in Google searches is an indicator that Reddit should have improved search on their own site.
In a different universe, I think the idea could be a valid attempt at dethroning Google. However, after seeing the changes to Reddit the past decade in our current universe, I wouldn't trust those same people to handle search for the world.
1. Improve old.reddit.com instead of creating this terrible Reddit v2 that encourages replacing real content with memes.
2. Build a dedicated Reddit search engine on a short trendy domain.
3. Remove all Reddit content from Google.
4. Carefully curate other quality sites into the search engine.
5. Leave Google to rot with SEO and Amazon referral spam.