Lies, breaking my things and being rude

I don’t know what else to do and I’m honestly at my wits end with everything. My step child has turned my life completely upside down. He breaks all my things, rips up my blankets and destroys my daughters toys AND never has a consequence to bad behaviour. He is RUDE to me, demands stuff, never asks. He overall just gives me attitude and I just take it. He lies and manipulates to get his way! He told a counsellor that he was being abused by his dad, neglected by not being fed while in our care and is put to work so he isn’t bugging us and let me tell you that kid hasn’t lifted a finger in years, he’s most definitely not being abused, I mean the kid gets no discipline at all and when he says he wants food, whatever he pleases is what he gets immediately or else he gets mad. We have child services coming to question us because of his allegations and guess what? Instead of confronting his lies my SO rewards him. We get a call and have been told about these allegations and my SO turns around and says to his son “what would YOU like to do that’s fun this weekend” I was literally dumbfounded as this kid sat here and continued to lie and instead of saying something to him he rewards it and he knows if he lies he will get his way. I have to sit here walking on egg shells, keeping my mouth shut because I don’t want him to keep lying about our home and have a bigger risk of loosing him and my daughter. He chooses what he does, wants to play on the Xbox ALL day? That’s what he gets to do. Wants to break my stuff? Great, go ahead and I’m not allowed to feel upset after I asked him not to throw my coasters that were given to me by a dead relatives ( I didn’t even have them out! He went out of his way to find something of mine) and started throwing it up in the air and I politely said you cannot be doing that, they are breakable and he cocked and attitude. I come in 10 minutes later and asked where the one went and he said it broke and that he dropped it on the floor. I was LIVID but I didn’t react, I took a breather and my SO came out knowing I was most likely upset and I said why doesn’t he listen? Why does he get to do these things after being told not to and I can’t say a single thing to him! Why does he get to have my home invested by CHILD SERVICES and put me at risk of loosing my child AND IM NOT ALLOWED TO SAY ANYTHING AND IM SUPPOSED TO SUCK UP TO HIM, I’m supposed to be even nicer and cater to him even more and HE KNOWS THIS. He knows that he will get his way and I just don’t want no part in it anymore. My life is miserable and he has my SO wrapped so far around his fingers it’s sick, he plays him so good and even lies about me to my SO so I get into trouble. I don’t want to take any part in being his caregiver, if he’s here, he should be my SO’s responsibility because I don’t want to sit here kissing ass every day, letting him tell me how it’s going to go, be rude to me, lie about me, harm my daughter and pets, ruin all my belongings, piss all over the door and not be able to stick up for myself. If my SO chooses to reward this god awful behaviour then okay. That’s HIS choice but I don’t want any part of it anymore. I’ve been nothing but loving, kind, generous and welcoming to this kid and only got the worst possible out come and I’m done letting myself be controlled by a child. Im at my breaking point.