Is this the right thing to do in a abusive relationship?

So lets say, I was in an verbally abusive relationship. In which my partner constantly uses strong words and extreme critism. I have told them to stop but they didn't. And sometimes I feel scared to discuss stuff with this person since they will be mad. Lets say this person has also gas light me , victim card , never said sorry , betrayed me , talking behind my back , saying bad words when angry to my family members and even friends.
And doesn't want to change themself when talked calmly.
But they are a person who is going all around seeking male attention, liking guys selfies , running to a male guy friend after every conflict.
Now in this situation, if I didn't had a friend since I lost them in this relationship.
Is it worth it to contact my past ex, who was nice to me for emotional support?
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5 mo
Should I breakup? And If I contact my previous ex just only for emotional safety and support is it good?
Is this the right thing to do in a abusive relationship?
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