DD is 8 and me and her dad have been separated since just before she turned 2 so she has no memory of us being together. Her dad was awful to me when we were together and has been worse since we split up and he's not in control anymore. He pays no maintenance but has stayed in contact with DD and things have been easier for last 3 years since we both met partners and settled down a bit. Trouble is he's just broken up with his and has switched his attention back to picking on me and making threats etc, though he is already in early stages of a new relationship with someone else so hopefully he'll lose interest.
My question is how to deal with the way he speaks to and behaves to DD as she's at a funny age. I can't stop him belittling the ex who was amazing or stop him introducing her to the new girlfriend etc but then she comes back from contact almost proud of him for having a new gf already and just accepting the ex is gone from her life. I'm worried he's making her think it's acceptable to bin people from your life etc. Me and DP model good behaviour and relationships and always treat each other with respect when she's with us but sometimes she says stuff that is just propaganda from him and I'm not sure whether I should correct her and then face his wrath for "trying to turn her against him" or letting her believe he's right. Examples are "dad said it's best he's not with you anymore as you weren't very nice to him," or "I can't understand why ex (who she prev loved) broke up with my dad. He only made her cry once..." I just want to scream he shouldn't have made her cry at all end you only saw once- that dsnt mean it didn't happen more...
I'm just a bit lost. I want her to have high self esteem and confidence but I also want her to treat people well.
Any advice?