No, you don't need to worship Amazon in a libertarian system, Amazon lives thanks to regulation (Amazon supports raising the min wage), and other import fees & tax exemptions that smaller businesses can't afford to bypass.
I personally don't to live in either possibility, neither in "nothing exist" libertarian dystopia, nor in the current normal society where i would need to pay for a bunch of selfish freeloaders who avoid taxes.
The only thing keeping the billionaire class from extruding you through a nozzle, drying out the paste, and then distributing what used to be you in powdered form as a daily ration to their indentured servants is the government.
A bad government can also enable this, but examples of bad governments are far outweighed by good or at least mediocre examples to the point of absurdity.
Whenever I talk to libertarians about this they respond "we'd just band together to make rules against this to protect ourselves" -- that's a fucking government.
(or they have some fetishistic fantasy about guns and shit)