Unstable STBX brainwashing our 4 yr old son!!

I've now been separated from STBX for 8 wee, with residential custody of our son. STBX demanded our son be brought back to marital home and that he have full custody. We just had emergency hearing for visitation but the Judge basically said, he's been with me since I moved out and he's not removing him from the new established home. He also made STBX go with the orignal visitation plan that I suggested 2 months ago, which he shot down twice with no counter offers. Needless to say the STBX WAS NOT PLEASED!!! Since then, his schedule is everday for 5 hrs in afternon and alternate weekends. Problem is... he's back to his habit of not feeding our son while in his care and if he does it's just pieces of chicken breast cut up on a plate. Nothing else, just chicken. Also, he's removed the furniture from our son's room and replaced it with dingy mattresses sitting on the floor ( a queen size with a full sized dirty mattress on top) as his new "big boy bed". By mutual agreement, he told me that I could come back to the house to get my things left behind and the baby's room furniture since it's now dismantled and in the garage. I went there yesterday and he renigged on me! I arrived and not only found MY things sitting out in the driveway but also our son's toys thrown into garbage bags. The son he claims to care so much about but he has no care for what he's doing to him right now. His only claim to why he would not let me get our son's bed is that "somebody needs to punish you if the courts and judge wont". Can't he see that he's not punishing me?? He's hurting his son with his weak attempts at vendictiveness. He's back to the brainwashing of our son as well. Everynight when I pick him up it's the same thing "daddy says I should only have one house." Daddy says we have to stay here, etc etc... He's only 4. He shouldnt have to go thru this from his father who claims to love him. Is there any thing that can be done since he still insists on trying to alienate our son from me and "buy his affection"? Every day our son has a new toy so our course now he wants to be with daddy since he has no rules there, no discipline there and gets whatever new toy he sees and asks for. After all of his claims that he loves and misses his son, once he finally got the visitation order the day which started Thanksgiving day, he has not been on time for his scheduled pick ups yet... some times showing up as much as 2 hours late with no phone call! I truly think my STBX has snapped but I cant prove it. It's just this is not who I married, not who I spent the past 9 years with! He's a threat and I'm just scared our son will get hurt due to his recklessness and hatred towards me. Will a guardian Ad Litem help in this case or what?? Could I get STBX to share cost of a GAL? What can be done to protect this little boy from his father's poisonous rants now that a temp visitation order is already in place?