If the decisions, in your estimation, are poor ones, then let the consequences be the ultimate teacher. Listening and understanding are better than anger and resentment. Unselfish concern for your child's problems is better than embarrassment. Asking for help is better than wallowing in self-pity. Resolving grief is better than sinking into it.
Pain needs to be transcended by unconditional love in an atmosphere of freedom.
Learning from our mistakes is better than indulging in a guilt trip. I personally found it to be a great relief the day I discovered that my undershirt does not have a large monogrammed S on the front of it. Likewise, there is no large W on my wife's clothing. I am not Superman and she is not Wonder Woman when it comes to parenting. The day we both accepted that fact was a day a heavy burden was lifted.