I found that Albert Camus' philosophy of Absurdism provided less depressing insights on Man's "existential crisis" that other existential philosophies:

https://en.wikipedia.org/wiki/Absurdism

According to Camus, one's freedom – and the opportunity to give life meaning – lies in the recognition of absurdity. In acknowledging the absurdity of seeking any inherent meaning, but continuing this search regardless, one can be happy, gradually developing his or her own meaning from the search alone.