I'll be over here in the corner, quietly valuing our species.
Semi-nihilistic whinging aside, am I the only one who gets tired of the whole trope of "humans are the real monsters" thing in sci-fi? Like, I get that were shitty, but it seems premature to assume we're the shittiest thing to come out of the universe. I mean we evolved this way, why wouldn't we assume some other species would evolve down a similar path due to similar evolutionary pressures and be just as rapey and murdery and dicks as we are? Hell, what if we're not even that bad, all things considered? Who's to say the Orks from Warhammer 40 aren't on the other side of the Galaxy, being more war-like than could possibly be, on our worst day?
Like you say, it seems likely to that any organism that evolves naturally is going to be at least
kind of an asshole. All our best and worst attributes exist because they, in some way, increased the odds of our survival and proliferation. So if there were to be a species that only exhibits altruistic traits, it would have to be engineered by a species that is, by nature, a bunch of dicks who would like to stop being dicks, but can't... because nature... and are capable of engineering a species that
is the species it
wants to be.
And then that species would need to off itself before it had a chance to destroy, corrupt, or enslave it's creation, which would be pretty easy to do.
It's also likely that the first species would find the second incredibly boring, and annoying, and have an almost irresistible urge to start bonking them with mallets pretty much from day one, so they would probably need to off themselves in a hurry.