I hate my older “brother”?

Ok so...BEFORE my Dad met my Mom (my parents are divorced btw), he had another child with his second ex-wife. He’s basically my older brother from another mother. He’s about 36 years old now and I’m 18.

He doesn’t deserve to be called a brother PERIOD. I don’t even call him family. I never speak to him. He never was there for me, he abandoned me when I was 2, and my sister as well. He abandoned my mother- his own stepmother (well ex-stepmom anyways) as well and his own father. He lived with his mother but now I think he lives in his own place. I completely forgot about his existence till much later in my life, in 2010. I didn’t even see him again until 2013.

We tried to fix our relationship but it has never happened. He promises to come over. Never shows up. 

The guy’s a mess! He was going to get married and almost did, but he and his former fiancé had a falling out. He is a wreak. 

The guy also weirds me out. He says he misses me, but it’s his own fault he misses me in the first place. I don’t give a crap if he has a busy job or whatever. When you SAY you will come over and see your siblings, at least MAKE THE EFFORT! 

He was going to come to my graduation party but he had a car accident. I showed no sadness or sympathy towards him! I don’t care if he dies. 

He decides to contact me NOW after he and I had not spoken in a few years. Out of all times he could have, he choose to speak to me NOW?! WTF?!

Is it right to hate him? Should I still reconcile with him?