Abusive relationships

I know it is easier said than done but has anyone felt like they want to stay in a relationship with someone even if they have physically abusive behaviors (anger issues) ? Is there any way people can overcome the abuse what steps do you take to avoid physical fights and how do you make things better when the past is Ugly? Please do not say just leave because I’ve tried and figured I just want to make things better with him not avoid the issues. What can I say or do to calm someone who is easily frustrated?