I have just about had enough but what do I do? Seemingly good life

I have an easy well paid job but it's incredibly boring and dont like how it's run. I have a wife, a nice house and car but I absolutely hate life. I'm anxious and down all the time and it's because I hate working and responsibility.

How do people cope? Why do I feel like this?

I only stay alive to look after my parents and my family but if they went I would shoot my brains out no questions asked