Satire?

I've read a couple posts which refer to Nightcrawler as a satire. I stopped to consider how well it fulfills the requirements. I expect exaggerated this and that in a satire. ok, it criticizes news, but polemic, diatribe, etc other forms can do that too. I am ready to be persuaded. I like it when someone smarter shows me the truth. (truly no sarcasm) I know satires do not have to be humorous, but I used to believe they had to have a fake, intentionally unreal feel. Am I incorrect? In a satire, the exaggerated qualities tip the balance closer to impossible not just improbable. Maybe it's a matter of degree.