The only purpose of live is to survive and breed as we were evolutionarily designed to do.
I do support existentialism though, in that life is truly what you make of it. Modern society as we know it has evolved faster than humans themselves, which makes life pain and enables us to act more destructively thanks to modern technology. Humans are living longer than before for no real reason, and most current social mores and survival requirements are manmade, like 9-5, going to college, capitalism, taxes etc. There is no rhyme or reason to any of this shit.
However, does there have to be? The cosmos, the stars, the sun, the moon, scientific breakthroughs, music, art, entertainment? They serve no purpose but I'm happy to have experienced these things, even if by random chance. Who cares if none of this matters? Sensory delights are pure pleasure. I'm a hedonistic slut for a reason.