It'll get better trust me. You probably don't really know who I am but something similar happened to a friend of mine. His mom was a real you know what and before his parents got divorced she would go around the neighborhood spewing lies about her (Soon to be ex.) husband. The judge decided that in the end the kids would stay with her, and they could see their dad every other weekend. Even after all of this, their eldest daughter moved out at 18 to go live with her dad, and their son goes to his house as often as possible. Overall it worked out in the end and the kids could tell who was really nice. Your story sounds pretty similar. Kids are pretty good at figuring stuff out, and I'm sure everything will be OK.
In any case good luck, and I hope to see some of your MOC's soon!