Nobody just becomes an adult because they want to. Sure, people can try to be an adult, but honestly, it’s not something you can control. One day you’re a kid, and the next day that’s all over, and you are an adult from that point forward. It’s not sad or painful, at least not all the time, but it’s not something you can just will to happen, it just does.
So trying to judge yourself on the basis of whether or not you are a real adult is sort of silly, although I’m sure everybody has felt like a “bad” adult, or that they need to “grow up”. But people don’t grow up, do they? No, people don’t grow up, they just…grow.