You’re all done being patient, understanding and wonderful. As of now, you’ll be thinking more along the lines of what you need. Don’t feel guilty. It’s about time.
You’ve just noticed that no one you work with has the faintest idea of how to do their job. Is it you? Absolutely not. Is it them? Maybe — but then, it might also be that you’re just not communicating well with each other. Either way, go home early. It’s really best.