Well, if you're going for dark, brooding, depressing, and feeling hopeless, I think you got it.
I really appreciate how you kept your rhyme scheme consistent throughout the piece.
Recommendation: This line--"he'll just claim there is none, you're just an animal that stood tall". I recommend you find a way to get rid of one of the iterations of the word "just" so it doesn't occur twice in one line.
I don't understand all the references, specifically; "There's a machine to make a cockroach do a mesmerising dance" and "Maybe a killer virus means we need to shoot the bear". That could mean they're too obscure, or it could mean I'm out of the loop. I don't know which but it wouldn't surprise me if it's the second option.
When I read through the song out loud, I can't get it to fall into any kind of rhythm. That could mean it'll be hard to set to music or it could mean I'm just not getting it. Again, I don't know which. There's lots in general I don't know, so don't attach too much importance to my feedback. Unless it speaks to you.
Have you already set it to music? I would be interested in hearing how you worked it out.
Vicki