Some critics of individualism propose an alternative social philosophy and defend it so it is then possible to compare their case to the individualist position. But more often than not what critics do is caricature individualism, suggesting that individualist believe that people are autonomous, meaning, exist all on their own with no need for anyone else. Or they claim individualism means that no one has any moral responsibilities toward anyone else. Or that everyone is basically self-sufficient or should be.
Now clearly very young people have to have the support of their parents, at least, and their intimates so as to get on in life. As they grow up the support they enjoy can gradually be made optional – some support will be rejected by them, as when they refuse to follow their parents' religious or political guidance. Yet, how would one acquire something as important as one's language and other skills if there were no teachers about to lend a hand?
Our obvious connections to many, many other people certainly cannot reasonably be denied; so by alleging that individualism requires one to believe in people's radical independence the critics have their victory via distortion, without actually having to make out a better case. Moreover they leave the impression that their preferred alternative, whereby we all belong to society and owe everything to it, is the only one and is trouble free.