Many libertarians quack aloud about their individual rights but do not, or pretend not to understand that their individual rights are limited by the rights of the others who live with them in the context of a community or a society.
This libertarian has quacked about balancing rights & actions which could interfere
with each other, eg, environmental regulation which prevents damage to one person
due to another's conduct.
That´s why we need laws, rules and conventions, so everybody can live peacefully in society, collectively, otherwise we´ll live in chaos and anarchy, in a society where individuals do whateve they want regardless of the consequences of their actions on others
I think you're not addressing the Libertarian Party (the subject of the OP), which
most certainly
does advocate the rule of law. IOW, we favor the existence of
government, the extreme straw men erected by some wags notwithstanding.
The issues are how much government, its cost, its powers, & its legal foundation.
You'll find much agreement with Libertarians regarding the positions you criticize.