You gotta serve somebody but the whole point of libertarian freedom is that you choose when and how to give it up. You can join the army, marry, adopt a religion, start a job, have children, or simply make moral judgements about the world and attempt to live by them (note that many of those things are not "hedonistic").

Libertarian freedom was hard won, it works, and it would be a damn shame to give it up due to the anxiety experienced by 20-somethings. Relativism is in no way the certain outcome of liberal societies. To the extent that there is a problem, it's non-judgmentalism, the trendy idea that it is suspect to render judgements and live by them.