distrustful, misanthropic, misanthropical, selfish, expedient, transactional, inward-looking, Hobbesian, self-regarding, Austrian, more...

optimistic, hopeful, pessimistic

jaded, skeptical, pessimistic, doubtful, distrustful, incredulous, more...

bitter laugh,   world-weary sound,   anti romantic,   rude but logical,   skeptical tone,   bitter and negative,   mad at the world,   critical of society,   maturing negative,   too knowing