I skimmed through the article, and I could be mistaken, but your point is that the Articles of Confederation was not strong enough to protect the public, especially children. However, I don't think that the linked story makes a valid argument against a free society, because no one would choose to go to a dumping site, if they knew that it had been a dumping site. The people who lived there could also choose to move once they realized it was a former dumping site. The NF Board of Education concealed that info, and while the Federal Government may or may not have helped in this case, they create far more problems than they solve.
No one would buy that site for a lot of money anyway; they only paid $1 for it.
The problem is that a completely free society isn't possible in a true sense. Perhaps if a group of like minded individuals moved away and established a colony, but the problem is that there will always be problems and disagreements. From the earliest time we've had some system which has addressed that and that it is invested with power over us. That act removes "free". Love Canal is an example of what can happen, but legislation attempted to remedy the situation however imperfectly. Once the dangers were realized then action was prevented to prevent it.
In areas where there was no such effective prohibition we see that companies take full advantage of the situation.
In an ideal world the pursuit of wealth and power would take lower priorities, but very definition of success is the acquisition of both of the above. Governments may (and do) further their control, but that doesn't mean that private industry or individuals are exempt.
Ideally the role of government would be to limit the exercise of power over the individual. The problem with that is that over time government sees itself as having more authority than it ought, and people will support it.
The Constitution was an imperfect document crafted by imperfect people but it has done something that few others have and that's withstood the test of time. While some see it as "quaint" or inadequate, I think that in the real world it's not a bad thing.
I really don't want to be a thrall to private or public powers, but on the other hand I cannot be allowed to exercise my freedom by harming others because I have the capacity to do so.
Consequently there is a dynamic tension that exists between the rights of the individual and the collective and the institutions which oversees them, whether governmental, private or social. An absolute solution cannot exist for that reason. You cannot make everyone happy at the same time.