It's easy for men, who may be making good salaries and never had to raise kids full time, much less raise kids and work fulltime, to say just leave.
Lisa is right, you have to make the right decision for you and the children. Be aware that what can seem like a good decision at the time, can have so many unforseen cibsequences. All I am saying is really, really think this through. Look at what kind of quality of life and environment there will be for you and your children. You'll be choosing a different lifestyle and family culture.