So sorry you are experiencing this.
Learning TTATT can have a different affect on each of us. Remember how we go through different stages on our way to a more normal life. Add to that a recent divorce, a lot of emotional changes for both of you.
Things might be very different in a short time. Do you still love him? Are you wanting to try to re-establish your relationship, or are you just resenting his current lifestyle? If the latter, then your feelings will adjust with time. However, if you still have hopes of a relationship it will be more difficult and probably demand more communication with your ex.
Examine yourself and see if you can figure out why the resentment. I remember Wayne Dyer (Author) said: "You can't should have done anything." In other words, the past is the past. Easier said than done. If you have a decent relationship with the ex, you might in time find you could discuss your feelings with him in a way that might prove helpful.
Sure proud of what you have accomplished in a short period of time. Hope things get better and better for you and the girls!