You know, and I can assure you, many people, including myself, are going through the same thing. It really is just about VCE at the moment. Most of the day really is just dedicated to studying. But you know, and I can assure you, many people, including myself, do not think you are 'hopeless', nor are you 'worthless'. No one is. And no one should view themselves as such.
What's the point of it all? Well, only you can answer that question. But whatever the answer may be, there must be a very good and most definitely a worthwhile reason behind it.
I think a lot of people are burning out at this stage of the year, and perhaps you are too. Is studying an enjoyment, or is it more a chore - a laborious, tedious task which never seems to end? It's good and most definitely beneficial to take a break from studying, and doing things you genuinely enjoy. Now I'm not suggesting that you perceive studying in such a way, but if I had to suggest one thing, it'd be that balance is the key to succeeding. And I believe this extends to other facets of life.
Right now, you have the ability to be happy, to smile, and to realise your worth. It's your choice - and your choice entirely.