More and more often when I search (using text queries, not image search, which I know has been polluted by Pinterest for years), I get pages upon pages of Pinterest results, sometimes the same Pinterest page but from the different pinterest country domains like pinterest.fi for Finland and pinterest.se for Sweden. Does anyone know if Google gives Pinterest preferential treatement in SEO rankings? Edit: A few comments were asking what my queries were to generate search results where Pinterest dominates, so clarifying that a bit. I run a site that has a colour search engine for lipsticks and since Google is one of the dominant ways in which people land on my site (searching for things like "nyx budapest lipstick dupes"), I was studying various makeup related queries to see which sites ranked highest . Edit2: Edited the title for clarity - I mean text search, not image search | 
There was a very good thread on HN about this not long ago(1). Google search is getting worse because it is letting companies like Pinterest game it.
Instead of fixing the spam they are instead encouraging companies to spend more and more time on SEO and coming up with their own shenanigans like better ranking for using AMP (defunct now).
People who generally make great content (think a researcher or a great software maker) can't compete with billion dollar companies like Canva, Shutterstock and Pinterest who spend millions of dollars on SEO and have dedicated SEO employees who spend all day sending outreach emails and doing experiments. Henceforth the good content never even sees the light of the day; drowned by all this "SEO" optimized content.
FWIW i still believe it's the job of the search engine to find great relevant content and show it to the user instead of the other way round. Though I know it's much easier said than done.
(1) https://news.ycombinator.com/item?id=25538586