I don't disagree - but being user-hostile aligns perfectly with their business model. The problem isn't a given implementation, it's the business model itself.

IMO it should be outlawed to profit off intentionally wasting people's time and promoting inflammatory content for the sake of "engagement", but drafting a law that would effectively cover this would be a major challenge (you could argue that the people doom-scrolling Instagram want the engagement-generating inflammatory content they are being fed), so my next alternative is to simply strengthen privacy regulations to make this kind of business unprofitable.