Jiggle you have got that all wrong
Emmie, please tell me how I have it all wrong then? To date, you have not spoken to the police, SS or WA, have you? How long were SS involved in your case? How long have they been warning you to cut this man out of your lives because you stood to lose your DD if you didn't?
If SS have been working with you for even a short amount of time, then you knew. So how did he get into the house where your DD was in order to push her. You say she was hospitalised and went straight into care from there. You say that he attempted to break in. Not that he broke in.
So. He gained entry to your home after SS had clearly warned you of the risks and consequences. And during the time he gained entry an altercation took place inside which your daughter was a witness to and he hurt your DD.
You did not call the police, GP, WA or SS then. It's unclear if you have called any of them even now, because as I mentioned, your posts are extremely vague.
Look, I know what it's like to be in a relationship with an abusive bastard. I was in one. I ended up getting partially strangled and got an emergency appointment to talk to Women's Aid. I spoke to my GP. The Police. I'd no children at that point so SS were not applicable. I did 6 months of counselling to get my head around the mess of a so-called relationship I'd wasted too much time and sanity on to the point where my life was at risk.
If you want to, you can get her back. If you follow to the letter what SS tell you, if you follow what police tell you, if you follow what WA tell you. You won't get her back arguing with a stranger on the internet, hand wringing about how you were warned or by insisting that mum knows best. I'm not bashing you, though you think I am. But right now, your DD needs someone who is stronger than you to protect her from your Ex. Right now, you don't know what is best, because your judgement right now is fundamentally flawed.