All of your critiques of State-backed crony capitalism are basically on point and I agree with all of them.
None of your critiques of purely free markets land for me.
Most of your bolstering of communist-style ideas don't appeal to me, but in a web of anarchist communities (some being capitalist some being communist) the communists would be free to try their experiments (and I support their freedom to do so) and the ancaps would be free to try theirs. Your hypothesis is that the ancaps would fail and the ancoms would succeed. I feel the opposite. Maybe some day we'll get to see who's right.
I think maybe one difference between us (you tell me) is that I wouldnt force the ancoms to be ancaps, while I suspect you would want to force the ancaps to be ancoms. As long as you agree that people should be free to try their own things and stay out of each other's voluntarily communities, we actually have no disagreement whatsoever in practice.