My wife has driven me to the wall?

Sounds like she's dealing with some anger problems. Leaving her will not solve the problem, and because she is your childrens' mother, it is important that you try to help her solve her problem. Tell your wife that her actions are unacceptable and that she needs to seek out help to change. Give her some examples of what she can do (talk to a friend, a church leader, a therapist, her doctor). Help her figure out what needs to be done, offer your help with the kids. She sounds like she is burn out, do something that will aleviate her stress. Do everything you can, she is your wife, she was once the love of your life, she is your kids' mother and she will be a part of your life forever, it's better to help her now so that the rest of your life will be pleasant. Good luck.