I Feel Pain For All Abused Children

My ex (never married of sixteen years) has given our daughter at the time when she was 15 or 16 year old marijuana enables her while living in his home she’s now 18 and shares it with her brother of 13 yrs old were in a parental evaluation process and I’ve taken him back to court two years ago. Finally this ends with her decision of who is the better parent long story short my ex holds no accountability in his parenting our children. Idk how he thinks this is acceptable.