I didn't realize that morality and philosophy had concrete black and white answers, and that adding your own thoughts to the discussion regarding those things was discouraged.
I'm not trying to be a shit, but your post comes across as either very gatekeeping or just snotty for no good reason. Do you have arguments to support what you're saying other than a hand-waving dismissal of the site?
The entire premise is not philosophically rigorous
Read any serious philosophical work and the first thing it does it tells you what it’s assumptions are about the world and basis for reality.
At no point does this website do that at all it just assumes a lot of background and then jumps into this concept that there exist these “win-win games” with a bare grounding in game theory, and that all we need to do is pull the concepts out of existing structures without acknowledging any of the foundational structures or any of the epistemological Foundations of the claims.
My primary problem with it is that it sneaks in a bunch of factually incorrect and problematic concepts like the idea of capitalism as win-win which has been thoroughly debunked by Proudhon in “What is Property” and expanded on by Graeber in his book Debt