Any siblings not adjusting well?

KT

Im wondering if anyone else is going through the same. My 21 month old is still not adjusting to his new sister. Every day I wake up I feel like I’m fighting a battle. He is still up multiple times through the night and my husband is out of the house for work by 2/3am so I end up taking him in my room if she’s crying, but then he won’t sleep because when she screams he screams so none of us are sleeping. I feel like she sleeps better than him most nights. During the day he is throwing massive tantrums, doing everything he is not supposed to do while making eye contact. Any time I nurse her he iss climbing on us. He acts really sweet one second and the next he’s trying to hit or kick her (I’ve gotten really good at blocking but he has hit her a few times and I feel so so horrible). When she cries he screams bloody murder. I have done everything I can think of and everything I’ve read to do. I’m giving him loads of one on one time any time I’m not nursing, I’m playing with him. I ask him to help all of the time and praise when he does. I have tried ignoring anything bad that he does that isn’t dangerous because I feel like I’m constantly correcting him. I miss him, the way he was before she was born. I don’t even know who this kid is. My husband is gone 14+ hours a day during the week, comes home plays with our son, showers, eats and goes to sleep so he can’t help much except for weekends and I feel really alone and overwhelmed.

Is anyone else dealing with something similar? I’ve run out of things to try and I thought things would get better by now.