Nihilism is a philosophy that embraces pointlessness. It, obviously, is unsatisfying. There was a joke once where several people were discussing their various financial investments. Someone asked this relatively poor guy what he invested in. The guy said, "All my money is tied up in trying to stay alive."
Often concern about an ultimate purpose weighs more heavily on the shoulders of those with more time on their hands. If we start with basics, either the universe was created or it created itself. The creator view implies that there are reasons and purposes that we should investigate. The no creator view has less foundation to it and subsequently is unable to provide any definitive purpose.
Even if one cannot bring themselves to consider a "creator" view, one can find transient interests and activities to divert attention from unsettling observations. It has been said, "Eat, drink, and be merry".
One aspect of the creator view is that we are supposed to do good. This implies a transition from our natural selfishness to a selflessness that seeks to do good for others. Even if one does not accept a creator view, one can attempt this approach as a purpose. This might explain the adoption of Stoicism in the ancient world.