<human>: Condense the text into a few key points

my 5 year old sister had to watch my mom and ex-stepdad divorce when she was only 2.  ever since, this guy has been a real douche.  he has fought constantly over the custody of my sister. my mom was down and out, nearly bankrupt, and me being only 13 at the time, could not financially help much. my dad (who previously split with her, and has a bit of cash) helped her out here and there. after a long while of battles, my mom won custody of my sister. however, she was to see her dad every other weekend. that was fine, i thought. but now he neglects my sister. he hasn't seen her in 2 and a half months. she cries every other day about how much she misses her dad and it truly breaks my heart.  this man has no sympathy. he has barely any feelings except the need for power. i ask of you, redditors, to give me a way to show just part of how much torture this man deserves.  WITHIN LEGALITY, i would like reddit to come up with a way to really get it through this douchebag's head that he needs to shape up and pay attention to his daughter, my half-sister.
<bot>: my 5 year old half-sister has a neglecting dad and i want, within legality, a way from you redditors to get it through this guy's head that he needs to pay attention to my sister.