Perhaps it would be too radical to admit "depression" is an entirely normal reaction to a world in which one exists as a dehumanized, chronically hollowed-out wage slave whose life has been reduced to a series of empty, mindless labor and emptier consumption rituals, comforted only by addictive drugs pushed on them at every turn, and vacuous social ties of similarly hollowed out wageslaves who only know how to monologue and compete; who breathes, eats and shits microplastic, pollution and pesticides, and can't remember the last time they felt somebody actually cared if they lived or died. It'd be far too radical to admit we're living through the slow-motion collapse of the living super organism we call 'civilization' and every case of "depression" is like one little support column showing signs of giving out under the weight of a monstrosity that has become too bloated and labyrinthine for its own good. Then we'd be engaging in reality, giving the "illness" the scope it deserves, and psychology cares not for this.
That fight club quote is brilliant too, I haven't seen the movie, I feel like I need to watch it now xD
Most of animal suffering is caused by human actions though (not including the obvious food chain issue of dodging predators) and their negative impact on the planet could never match ours. It would be very unfortunate if Orangutan started farming, fighting wars and wearing Levi jeans and Iguanas started making nukes but I just don't see it happening. The rest of nature doesn't seem to be affected by the sickness of greed. They eat, they get full and they stop eating, even if a meal sits on their face they will leave it there until they need it, neither do they horde resources they don't need. I just feel like it would be nice to see what the planet would look like now if we had never touched it.