Trials are to be expected in this sin fallen world. Trials can produce temptations to sin.
No temptation is new. Your fight with discouragement is common to mothers throughout the ages.
God is faithful to deliver you from your trial or to provide all you need to face the trial without sinning.
God provides both forgiveness upon confession & repentance and wisdom & power for future failures.
God expects you to deal with your children's shortcomings with understanding using biblical goals and methods. Even if you think your efforts are fruitless!
God's purpose in every trial is to mature your faith so that you may give Him glory by looking more like Jesus.
You are to persevere in all your mothering issues using God's Word as your guide - not trusting feelings.
All children are a gift - not just the easy or good ones!
A vibrant personal relationship with Jesus Christ is the single most important factor in your mothering.