I think there's a few different issues in what you've said.
Firstly, I completely understand why you think that way about your ex, but it's really not a healthy way to think and it is almost certainly going to be holding you back from building a "new" life. It might be a good idea for you to look into some counselling for this. If he is threatening you with the police, it seems like that relationship is so broken that it couldn't be repaired anyway.
Secondly, have you spoken to a sollicitor about moving away? How often does your ex look after your DD? I am not saying that it is a good idea or possible, but it's not automatically impossible for you to move back home, but you would need permission from the courts and it would really have to be in the best interests of your child. It may well not be possible in your case, but would it help you to make peace with the situation if you had a clear answer?
Thirdly, are you keeping regular contact with family and friends back home? It can be hard to stay in touch if you are feeling depressed or anxious, but even virtual interactions can really give you a boost. At some point, you'll be able to meet up with them in person again, even though it feels like forever away.
Fourthly, it is such a difficult time to make friends (I have ADHD/autism so struggle anyway) but, for example, I have an interest in drawing and painting and have been doing an online portrait drawing competition (Sky's Portrait Artist of the Week) and posted my drawings and joined a related group on Facebook and it's really given me a boost feeling like part of a community. Is there something that you like to do in your free time that you could get involved on line? Like a writers' group, online craft club, an online forum for a certain sport, online choir? If you have a particular interest, someone on here may be able to suggest something.
Lastly, online dating can be brutal, don't think it's you.
Massive virtual hugs to you.