AITA for refusing to spend time with ex-wife and grandkids? Grandkids yes ex-wife NO

I neglected to state that she is bipolar and will sometimes (mostly) stop her meds because she feels she doesn't need it in her opinion.

I'm not trying to excuse her behavior nor am I trying to disparage mental illness I'm merely stating a fact.

I did not know she was bipolar when I dated or married her and only found out after our divorce. She is/was the cause for a lot of mental, physical, and emotional abuse.

I posted this initially in the hopes that they (my kids and her) would see this and if you in the Reddit community/family saw this and agreed that I am NTA that it would hopefully change at least one behavior. I'd love nothing more than for her to maintain her treatment/medication regimen and leave me alone. I have no idea why my kids see all of this as funny as they do.

/r/AmItheAsshole Thread