Either you live in a very different bubble, or you are building a strawman to demolish.
I never even heard anybody claiming that democracy is perfect form of government. People in democratic countries usually accept that democracy is messy.
The real killer app of democracy is the ability to change leaders without death or bloodshed. Of course it results in fewer big projects being built (though the US was very good in building things like Apollo or the Interstate System, once - it is mostly environmental regulations that get in the way now, and not pure democracy).
But the stereotypical danger of autocracy is that its big projects will be a useless money sink (like this [0]), or even destructive.
I never even heard anybody claiming that democracy is perfect form of government. People in democratic countries usually accept that democracy is messy.
The real killer app of democracy is the ability to change leaders without death or bloodshed. Of course it results in fewer big projects being built (though the US was very good in building things like Apollo or the Interstate System, once - it is mostly environmental regulations that get in the way now, and not pure democracy).
But the stereotypical danger of autocracy is that its big projects will be a useless money sink (like this [0]), or even destructive.
[0] https://en.wikipedia.org/wiki/Neutrality_Monument