Hiya.
I'm a few years out from a remarkably similar situation. Not WA who made the referral but similar.
In the nicest possible way, you are minimising what's happening here. You're understandably focused on what SS could do to your family, and ignoring the abusive situation that has led to you being here.
Here is what happened to me.
I received the call from SS (after hoping for a couple of days that they'd be overrun with "real" cases and would have no need to actually follow up mine).
The reality of the contact let me see what was actually in danger of happening.
I had thought it "wasn't so bad" and that I could fix him, and that it wasn't impacting DC.
It WAS that bad, and I couldn't fix him, and OF COURSE it would impact DC. The referral simply made that clear to me.
I ended the marriage that same day.
It was incredibly hard, and tbh as people have said, potentially dangerous. I had SS on the phone locked in the bathroom at one point while he banged on the door. Of course he also then threatened to kill himself. This was the man who I thought I loved beyond all things and would never hurt me, but the reality was it had come to this. I had to stay calm and practical for young DC.
I told him either he could leave that night or me and DC would have to leave, and eventually he left when he saw I was serious.
I took three days off work (lied about why) and by day three I had the house on the market and we were working out how to coparent (another thread entirely). SS did speak to nursery, refer me to a DV service and so on. All these things terrified me. Utterly terrified. I was able to tell them "I've kicked him out and I'll accept any help and advice you have, no question" because NOTHING, NO MAN, NO MARRIAGE, is as important as my DC and why on earth would I risk having SS involvement and staying in an abusive relationship and the fear of having DC taken away????
What I'm saying is, without sugarcoating it, if you genuinely want to put your DC first you have to leave him.
Professionals are telling you that your relationship is so abusive it's damaging your children, so stop making excuses and being mad with them.
Be mad at HIM for putting you in this situation.
Don't be mad at yourself for not getting your DC out of it.