This view however suffers from what I call "the postmodern trap." If everything is relative - if there is no objective function to maximize - then how do you actually do anything? There exists no optimal decision - no rationally justifiable decision at all - because there is no direction upon which you can orient for any reasonable period of time. And so postmodernism, while logically sound, leads to abject paralysis. This is the trap of an entirely deconstructive and equally self-deconstructive philosophy.

What remains then, in my opinion, is a more pragmatic outlook. You need to believe in some arbitrary, "objective" axis upon which you can orient your life, be it career, knowledge, family, health, and so on. This gives your life purpose, for now. But none of these rational purposes are truly unimpeachable - nothing is (see Gödel). And so, over time, things will change - life happens. You simply re-orient when it does, without being seduced by the false allure of "objective" goals, nor falling into the postmodernism abyss of nihilism.