I think you're confusing cyncism with reality and logic.
It's not cynical to say ad-driven social networks are adversarial to their users, it's logical and unavoidable. Because they're optimizing for different things.
Networks want the best, most targeted ads, so they need the most data. They want the highest watch times and retention, so they MUST develop addictive algorithms.
It's like selling a cigarette. Is there any non-adversarial way to sell a cig? No. You're optimizing for the most smoking. Okay great, let's concentrate the Tobacco then so we have more nicotine. Let's use butane rings so the cig burns faster.
I do agree 100% with your points about legislation - this is the only path forward. And, about not humanizing corporations. Corporations are more akin to machines or algorithms.
But, because they're more akin to machines or algorithms, we can prove when, and why, they are working against our interests, and it's not cynicism.