Is anyone else tired of their siblings anger fits in response to stupid jokes

I have a little brother (4 years younger) and yesterday as a joke i accessed his myanimelist (MAL) account and told him about it. i assumed he would joke about it then move on. At first he jokingly told me he would stab me with a kitchen knife. Then he came up to my computer, sat on the chair i usually sit on. He started telling me about how years ago, when we were kids (pre-2022) i used to fight him and beat him up. i apologized saying i was stupid back then. He then started messing with my PC.

He then started slamming his own head extremely hard onto the table a few times. Then he was about to hit me, but he didn't. My dad was watching all of this happen, he was sitting a few feet away from us. I said i was joking around with him and he got angry. 30 minutes later, he lies still on a sofa near the computer. Then he walks up and stands next to the room's door. After being tired of his anger fits that he throws everyday, in a fit of anger i exclaimed how much i hate him for starting stupid arguments whenever i'm joking around.

i called him "mentally unstable". Keep in mind, he calls me all sorts of crap all the time, like every insult you can imagince. So when i call him mentally unstable, something he has called me in the past, he picked up a mop then hit me with it, so i hit him back. I had not hit my brother since 2022, i heavily regretted being violent in that moment, him starting the violent action doesn't excuse me doing it back to him. Then he runs to the toilet, i tell my mother what he was doing, so then she gets angry. He comes out of the toilet, i try to record him with a camera, because i know he won't do or say anything violent if he's on camera, as he will regret it later. After 30 seconds, my dad tells me to put the phone down, stating im escalating the situation, at the moment i thought he was wrong, but he was probably right, recording the situation would have made him more violent.

Then he screamed extremely loudly and started crying saying "maybe i am mentally stable, thats what you want me to be". I told him how he forgets every bad thing he does to me and the other siblings, only remembering all the bad things everyone done to him, basically having a victime complex, i scream and then tell him i also cry when he calls me insults.

Then i started crying about how since the last 6 years, He literally wakes up every day, calls me names, when i ask him to stop, he says he'll keep insulting me everyday. He starts a fight with me once every 2 days. I try to reconcile with him, try to be nice to him, but he says im doing "pedantry and therapyspeak". He wants me to have constant hatred towards him, but i dont, he doesn't like that, as he doesn't want to be friendly with me, he wants to keep the fight going, while i gave up a long time ago.