Getting angry with age

Mark Ravenhill, who has just turned 40, argues in The Guardian argues that writers don't necessarily mellow with age.

...the idea that the older you get, the less angry you are is clearly wrong. Very wrong. Look at pensioners on buses - pushing, grumbling, snarling at the driver - and you see a whole generation who are definitely not reconciled with the world. And having experienced some very alarming internal shifts - huge doubts and anxieties about myself and my place in the world as that 40th birthday loomed - I can safely say that you don't become comfortably reconciled to yourself after 30.