“Postmodern philosophy” is an oxymoron. The purpose of philosophy is to seek Truth. The main mark of postmodernism is the idea that there is no such thing as absolute truth. How in the world can we expect to find answers to life’s questions with this kind of worldview?
A logical philosophy consists of a linear thought pattern. There is a question, and then certain arguments used to reach a conclusion, and then the answer or conclusion itself. Perhap this will also lead to another question or problem. Logic walks in a straight line from question to answer.
But if there are no absolutes, we cannot have this kind of logical thinking. Instead we end up sucked into a circular vortex of uncertainty. No questions can be answered with certainty. This vortex can only lead to confusion, hopelessness, and ultimately suicide, be it of the mind or the spirit or the life.