AITA im I super mean to my siblings.

AITA basically I know that in these situations I am the bad influence and bad sibling and I know that I just need help improving and becoming a better person and I am writing here I guess just for some needed advice and help. So I am 19 years old and I have a brother who is 15, and sister who is 12. And I don't get along with them like at all. I have massive anger management issues, like verry bad and when I was younger I would take my frustrations out on my siblings, nothing really bad I would just as a kid hit my brother for something and then he would hit me back and I would have a time outz and have to apologiess, and then he would do the same thing to me, Id say it's a little part of the sibling experience. But when I was growing up about the age of 14,15 I started being a really jerk like say verry rude comments and just have a lot of pent up rage I would take out on them and just over all be a terrible older sibling, really bad. Recently as I grew up and matured I realized that my sibling don't like me I seriously don't blame them I didn't like myself for a verry long time to. And they prefer eachother company way more and I would never admit it out loud but it really bother me because I'm moving out in a couple months and I don't want us to lose contact and that is exactly where we are heading. Now that my brother is a teen he is going through his own problems and we started fighting a lot again like huge fights over stupid stuff like my dad wanted me and my siblings to go to the pool they didn't want to, my dad made them go with me, and then me and my brother had a huge fight because he was already annoyed that he had to come and I pushed his buttons by because I was grabbing something then he called me a bit*h and other not nice words and my anger to the better of me and I hit him witch I am verry embaresed about, he stormed out and is refusing to talk to me and stuff. My sister as the youngest child was part of this fight didn't say anything and now is just also not in the mood to talk. She is also dosent like talking to me because she is generally closer to my brother and she feels like she is chosing my side over his when when we talk, also she she never knows what mood I'll be so she just eliminates the suspense and Dosent talk to me. How to I fix my self and my relationship with my siblings.