Standing with you in prayer Mei. Please do not throw in the towel. You are correct the enemy is trying to steal what you have worked for in the last year. Be strengthened in the Lord. This is a lot for you to carry by yourself.
We pray that God will give you wisdom to deal with Joshua the correct way. This may be adding extra pressure upon your entire family. Is the facility something you could consider until you retire? This is a high possibility that is the main factor (the root) for what is happening with your husband, Seng and possibly your job performance. If removing this one stressor in your life would help to get everyone else on track then this may be something you want to think about. This is temporary until you have the time to handle this.
At any rate, we will pray for you and your entire family.