How to deal with my rude and arrogant twin brother? Both are 27M in the US.

Me and my twin brother are both 27M raised in the US. We both grew up loving the same things and same interests but as we got older we started to have more conflicts around shared resources such as cars, video games, or friends. We spent some time apart in college and seemed to do fine for the most part. I keep asking myself the nagging question that everyone asks me is “if we are close.” I often find myself wanting a different brother. He is incredibly rude and selfish, and can’t seem to have a normal conversation with me. For example, if there is ever a family trip with the entire family he will come and find every single excuse in the book to not come, and then will make us beg him to come. When he does come he makes the trip all about him. He’s been incredibly rude to all of my girlfriends I’ve ever had for whatever reason. Whenever I have any accomplishment he always belittles them. He is extremely immature and selfish which makes even small things turn into an argument when sleeping in a shared bed for vacation he will refuse to be considerate about giving me enough space to sleep.

Recently, we both live in the same area now and I know he talks poorly about me to our sister and/or friends. My sister recently went through a terrifying manic episode and I suggested to my parents that we should take her to a hospital and he used that as ammunition with my sister to make me look bad and told her I wanted to “hospitalize” her in an argument. In front of my parents he will try anything to make me look bad and often snitch on me about things I would have kept secret and do keep secret for him from my parents (small things like drinking or tobacco use.)

I cannot tell if his behavior is from me being on paper more successful than him and if that affects him in anyway? Just grasping at straws. My siblings often call me the favorite of my parents as I’m the kindest and least problematic.

Not going to list everything he’s ever done wrong, I’m not perfect either.

Feels like overall he’s incredibly rude, arrogant, and stubborn to me after I only show him repeated kindness. Simple conversations with him feel so burdensome with me asking a simple question ending with a snarky or rude answer behind it. Im patiently can’t stand it but it also hurts to see. His friends often complain to me about it as well.

TLDR: Incredibly rude and arrogant twin brother who was once close with me. Talks bad about me and spreads things about me behind my back. Isn’t accountable or considerate, and makes us do extra laps for him like he deserves it. Simple questions or attempts at conversation end in snarky or rude responses. I’ve tried to bring this up to him in the past and it ends with him saying I’m being dramatic.