I have not seen you much I admit, but what I have seen is that you have a large number of interesting characters and Ideas, you are well liked, you have a lot of people you should consider friends here...
...And you leaving will be felt by everyone reading this thread, and you will be greatly missed.
If this is what you describe as "useless" then bluntly, you are wrong, you are many things, but you are NOT useless. If your parents give you grief, that is their damn problem, not yours. My advice, continue to develop and learn, you are imaginative, smart, and they are wrong about you.
All you need to do is to prove it.