While I agree with much of the libertarian philosophy, it is too reliant on the "government bad" mantra. There are many things that can only be done with a strong and competent government. Treating with other nations is an obvious example. So is regulating interstate commerce. (Imagine how business would grind to a halt if every company had to deal with 50 different sets of rules and regulations for shipping and payment.)
Furthermore, some markets are vital but fail when they are exclusively private. For example, the auto insurance market would fail if private insurers were not regulated. Likewise, the health insurance market would collapse if left solely to the insurers and providers--they would only insure those who posed the least risk, and that number would shrink every year (insurance market failures are commonly known by the colorful term, "death spiral").
As far as "perpetuating individual freedoms" is concerned---freedoms can be abused, and for that reason cannot be absolute. I do NOT, for example, want my neighbor to have the "freedom" to set off explosives in his back yard or fire guns into the air. I do NOT want him to have the "freedom" to abuse other people or to discriminate against them based on their gender, race, religion, etc.. I do NOT want the company he works for to have the "freedom" to pollute the air or foul the water. Et cetera.
I think that one of the strongest arguments against libertarianism is illustrated by the continuing refusal of the public to wear masks. This "I will do as I please, because I have FREEDUMB" philosophy has cost hundreds of thousands of lives. Our actions affect others. We should not, in fact, have absolute freedom or anything close to it. Nor should we listen to conservatives who bleat that every single rule and regulation is a heinous, pernicious assault on our sacred 'Murrican freedoms founding fathers Hillary sent emails blah blah blah belch grunt snort.