The world you may see in the film may seem chaotic and sadistic, but it's not some other world, it's the one you are living. There's only a difference in the point of view. There is only the change in the species. If you feel sad for the homo sapiens in the film, then you have to know that there is only the extinction of just one species, in our real world the extinction of many species had happened already.
As humans, we still believe we are far above any other species and we are at the edge of evolution, just some thoughts. We may be one of the interesting species in the world, but that didn't give us any right to dominate over any other species. There are certain things to be followed as part of the environment, which we always ignore.
This is some usual idea that every student hears at a certain part of their educational life. As getting older they all start to ignore the point in it. We easily find a lot of other things that change the directions in our life. We believe that there's a lot of others that are far important than the environment.
There's a face we could see in the film, the elephant you see on the introduction scene says enough of the story. Just reading the news and acting like not caring about anything while the whole world goes under chaos.
This film goes more into the emotions other than just sharing the idea, we didn't even let live the ones that are under the sea. They couldn't even the beautiful life they had. The only thing that makes a man happy is those cool drinks and a rise in the stock market. If you feel sympathy towards the humans in the film, then you should believe that there's a lot of species left in the world which we have to be sympathized for.
The chaotic world may see a bit vulgar at the beginning, if one could open his eyes and look at every detail around him, the film will seem like a documentary of the life we are living.
You can watch the film from here