Just because I do not want to continue trying to explain things in the limited terms you choose to accept does not mean that what I have to say does not have substance.
Sorry, I'm not (deliberately) trying to be a cunt, I'm trying to say that you might think "oh we're not doing well and could do much better", but since it's not clear that we agree on what doing well is and what doing better would involve, it's going to be very difficult. There are massive and important systemic limits to knowledge.
You can explain or answer in any terms you like, I just want to know what you mean.
Which economic system would that be and why is not being used?
Don't you see what's wrong with this question? The economic system is capitalism, and it
is being used, in a variety of contexts and institutional settings, all of them very different and unique to themselves. It's also not being used in a variety of settings, for a variety of different reasons.
Economics is about the management of scarce resources. Capitalism allows people to make those decisions themselves (other systems do it differently). You might not like the nature or the outcome of those decisions, but it is literally inconceivable that you would be able to make better ones.
What percentage of people have access to safe drinking water and adequate sanitation for instance?
I think this is a good question. People with access to safe drinking water live in capitalist democracies. People without access don't.
How happy is the average city dweller?
Relative to what? But really, I don't think that happiness is important, or an acheivable outcome for any economic or political system.