tl;dr: Stoicism's first response to a problem is to change the individual (have the individual reinvent their worldview such that what can't be changed is instead accepted and perhaps even reveled in). In a world of decay, having this as your first response delays -- if not outright masks -- collective action towards rectifying the problem, towards building a better world.

Stoicism is great for dealing with things you can't change (illnesses, famine, etc). It's great for accepting that personal struggles, like the fact that your parents aren't going to say the Thing and give you a hug.

But what does Stoicism offer to the community? I as an individual can create my own happiness, but nothing in the philosophy would properly motivate me towards helping to fix the world with my brethren.