Hasn’t virtually every single study ever performed on the subject found a strong, direct link between unhappiness and social media use?

From what I've seen, the answer is it's complicated. On avg, you're right, and it prob does cause unhappiness and mental health probs. But there are unique situations where it can be helpful. Ex, people who do not fit norms of thier peers, and find healthy connections with others more like themselves. So it has no single, simple universal answer.

The algos, esp on big tech social media like FB, IG, TT, X, etc, are very much designed to make you unhappy and outraged. Even the data scientists who designed the algos have testified to that fact before the US congress. B/c anger and outrage is the most powerful way to make you engage more. TT's internal research shows the more you use TT, the more probs you have with cognitive skills like memory formation, empathy, and anxiety.

Ofc, the harms of social media doesn't mean these bills are the right way to handle that. I believe we have a prob. But this is not the right solution.