Sorry to hear of another going through the nightmare of a JW/"worldly" marital breakdown. Don't second-guess yourself that it might have turned out better if you had held your tongue and not discussed WT doctrine. That doesn't work either (i.e., it didn't for me). If you haven't read The Eclectic Marriage (at Freeminds.org), please do--at least some of the scenarios it describes will be familiar to you.
Please take care of yourself and the children as best you can. (I would wager that one reason for the break-up was your "worldly influence" on them, not forcing them to go to the Hall and out in "service" every weekend.)