Another problem with materialism is that, since it denies transcendence and metaphysics, it remains stuck in a loop, with no choice but to feed on itself. With no soul a person is left with mere mechanism and a robot-like persona. In such a state aesthetics, philosophy and mysticism are of little or no interest, or irrelevant.
So what are we left with? We're left with the illusion of a void that can be filled with almost anything and a measly, pitiful state of affairs in a world ruled by psychopathic narcissists who can blow it up in a capricious orgy of megalomania.
Not good. mon ami.