The world is aweful because the economic and political system is aweful. They're aweful because they're run by aweful people, who should spend time on something else rather than being a bad leader. And they're aweful because of the world is aweful.
It is so easy to blame politicians because that means you get to blame someone else.
What if the economic system is broken to begin with and the only thing you can do is shift the suffering away from your interest group to another interest group?
In other words, the economic system itself has created interest group politics.
From that perspective having better leadership is irrelevant. Not even a centrally planned economy can be the solution since it can only shuffle the suffering around.
What is the underlying problem? Increasing your personal share of wealth without creating new wealth aka rent seeking. If politicians were merely in the business of getting rid of rent seeking, their "competence" would hardly matter.
A centrally planned economy has the worst track record in history. It definitely won't be the solution.
Is there a reason you're spelling it that way?