Hi icandothis,
It is understandable that you can’t get your head around the way your ex behaved. There is no justifiable explanation for abusive behaviour. It is used to gain power and control and abusers take no responsibility for the pain their behaviour causes.
Have you had any counselling post your separation? If not it could be really helpful to do so, to try to work through some of your thoughts. Contact your local domestic violence service or ring the helpline on 0808 2000 247 and they can signpost you in the right direction.
Kind Regards,
Lisa