I think it's not as impossible as you make it out to be. He might not understand how to do it, but if he were to leverage the tools at his disposal, he definitely could do it.
I initially thought that he could not gut the American administration _too_ much because of institutional inertia and the systems put in place that still had you country functioning pretty well once he took power. But now here we are, him having placed stoodges at the head most most institutions and gutted them of power.
If he could do that, he most obviously could lead to Twitter falling apart. Another poster outlined here how that could work:
https://news.ycombinator.com/item?id=23330463
