If you are a selfish enough asshole that you don't give a shit about the rest of society, get the fuck out of it!
I am sure many people would love to "get the fuck out of it"; however, there is nowhere to go that is not claimed by one society or another. Your solution for dealing with an individual's unhappiness with society is therefore unworkable.
Even worse is that when we follow your line of reasoning that the importance of society outweighs individual freedoms, we end up in a very nasty place where whole sections of society can be "eliminated" for the good of the whole. Defining which sections and what is good can turn out to be quite "interesting". If you do not think it can or will happen, you are not very familiar with history.