I hate old people
Why do you hate old people?
Some old people are very happy about their lives, and why should they be? They seem delusional about it.
You have a bias against elderly folks it seems, but they might just be happy. How do you know they are not? Never assume things about them just because of their age. You will be sorry to hate them and not get to know about their past lives and what they accomplished.
It's boring, and I want a life.
You may think being old is boring, but one day you'll be old; there's no escaping time. Instead of disliking older people, accept that you too with be one of them, and perhaps you will be happy when you're they're age.