Why shouldn't I want the world to end?
Why do you want the world to end?
It's going to end anyway.
It isn't right to wish for destruction on yourself and the world. You might be experiencing an issue with your mental health if you are persistently wishing for your life to end. You should speak with a mental health professional to process through those feelings and learn to enjoy life again.
It is my way of escaping from my problems.
Hoping for a catastrophe to befall the world just so that you can avoid dealing with your issues isn't correct. Instead, deal with your issues with a counselor, but don't take it out on the world.