Communism is indeed worse, but that doesn't automatically make our current system 'good'. Yes it's the best we tried so far, but it's not like we tried soo many others and this one ended up being the best out of all the ones tested.

I'm sure if we took all the top math, quant, economy and finance grads in the world and book them for a few months in that fancy Swiss Alps resort at Davos where world leaders meet up every year to discuss how to screw us, they could come up with a better system than the one we currently have.

The problem is most likely the new system would not end up favoring the same winners of the current system, hence there's no desire to ever change the status quo, so we have the communist system as a perpetual boogieman to discourage any other systems being trialed as if that's the only other option.