We all know how you're feeling. The side effects of a prostatectomy can be discouraging and depressing.
Still, and I don't mean to sound harsh, the first thought that occurred to me when I saw the title of your thread was that I'm pretty sure it wouldn't be hard to find thousands of children and adults who would gladly trade their situations for that life you don't think you want.
My older brother does a lot of work with St. Jude's, raising money for children battling cancers. I'll bet any of those little kids dying so young would switch places with you in a heartbeat and not care a bit about having to wear diapers and pads.
Our brave military men and women coming back from war zones minus limbs, or with brain damage, or with other disabilities would probably also accept the life you now find yourself living in exchange for the one they're going to have to live with for the next 50 years.
If you have children, or grandkids, or a wife.....I'll bet they think the life you have is just as precious today as it was prior to your surgery, and probably more so. I'm pretty sure they're thanking God you're still present in their lives, incontinent or not.
I'm not trying to minimize the impact of coming to terms with (temporary) incontinence. I'm just saying that you can't let yourself lose perspective. Be patient. Give your body time to heal. Focus on the positives in your life.
And, as someone said previously, there are medical options to help correct permanent incontinence, if that should turn out to be true in your case. Someone mentioned the sling.
Hang in there and keep moving forward. Patience. Good luck to you, my friend.