We still haven't found a better resource allocation model than pricing.
We have tried central planning, and it resulted in horrendous living standards (as compared to the western world), queues all-night-long that you had to wait in if you wanted to buy bread in the morning, "if you're not stealing from your employer, you're stealing from your family" being adopted as a common proverb, and the whole system basically running (for some definition of running) on bribes, favors and theft. Communism finally fell around '89 in most of Eastern Europe, and we're still recovering.
Perhaps you could solve some of these points with computer-aided optimization and dystopian AI-powered mass surveillance, but is that really what we want?
In my view, the problem isn't capitalism, the problem is the government trying to fix capitalism, but instead making it much harder for small competitors to emerge, effectively causing almost-government-mandated monopolies.
Think about what industries are complained about most in America, and how regulated those industries are. You can't just lay fiber, make medications or help patients without going through a regulatory minefield, mostly for good reasons, but this is why the big providers of these services aren't outcompeted by smaller ones. There's a reason why the mostly-unregulated big tech is considered to be one of the most trustworthy industries among most (non ideologically motivated) consumers, far surpassing any political party.
Capitalism is sometimes bad, central planning is worse, but heavily regulated capitalism is the worst of them all.