Four problems with the alien civilization;

"We are a race that crawled out of the slime of selfishness and into enlightenment ourselves when worse came to worse, hey we totally didn't notice these facts of our own history until you pointed them out!"

"We've been monitoring your species a long time and despite you steadily learning the importance of other species and increasing awareness of environmental stewardship with each passing decade, still vastly flawed yet reaching a point where you have even insects under government protection, we haven't noticed any capacity to change whatsoever, nope. We're not saying you're not changing fast enough, that it's too little too late, we're saying it's not there at all."

"We've been hoping you'd change for a long time, we've waited and waited, we've . . . . pretty much sat on our hands. When we finally do decide to take action the first and only action we could think of was genocide. You humans probably have more humane measures against insects you dislike, but that was all we could think of."

"I've been monitoring your race for decades and I never happened to notice this "love" thing. Yeah, you humans probably know more about the behavioral nuances of ants running at your feet than we do about you, we just paint your species as the "black" in "black and white" which kinda makes us look really detached, cold, oddly prejudiced and as well as a bit reactionary ourselves."

The last one actually kinda reminded me of the cold government bureaucrat or heartless straw vulcan scientist archetype you'll see in other movies.

I know the aliens were viewing the earth as a whole and humans as just one species on it. Humans aren't supposed to be special in this movie, but I still think the aliens should've been able to do better than this. Also, humans aren't a threat to earth's ability to support life.