I feel like calling modern computing a mess is harsh. Modern computing encompasses a plethora of applications, to a point where we can model most if not all workflows. It's the product of millions of humans working together for half a century in a very large graph with little connection between each clusters.

Nothing at that scale is a "mess". It's simply what was created by our collective distributed system of humans and we should appreciate that it's not really a problem that can be solved instead of talking about it as if we could "fix" it.