Anyone who works in the criminal justice system understands that it takes an average of at least nine times before a women leaves.
The Op is currently in the middle of a cycle of abuse and isn't ready to leave.
She still has hope that her abuser will change, see the error of his ways etc.
The best we can do is be supportive of where she is currently at. While it is easy to say to leave, her abusers will have convinced the OP that his behaviour is normalised.
The only surprising event is that the OP called the police when the abuser assaulted her. These men generally only make physically contact when they are sure they can get away with it by damaging the women's confidence and normality so badly.
Alternatively it is because the OP is now standing up for herself that his behaviour has escalated.
Op you have done a number of brave things, you have contacted the police, told you let family, for all the good they are, and you have reached out for help here.
Take the positives here and leave the rest.
I would encourage you to reach out tot women's aid and try reading up on Domestic violence.
Your abuser have altered your reality, so that you compartmentalise his behaviour to you from how he behaves towards the children.
But how you behave towards your partner says everything there is about you. He isn't a good person,
Keep planning your exit, speak to WA, ask the police domestic violence officer to give you a call. Each force should have a specialised Officer.
Don't worry about anyone who said you have wasted police time that is a nonsense.
Stay strong & safe