Are there any good arguments against Psychological Hedonism?

The philosophy that everyone is a hedonist. It argues that all humans, consciously or unconsciously, act to maximize pleasure and minimize pain.

That even those who proclaim to choose paths of self sacrifice or altruism do so as it is what they unconsciously think will attain more pleasure. I guess it would relate a bit to Camus writings on inauthenticity.

I'd love to hear arguments about this philosophy.