I realized it when I looked at how my brother acts from trying an outside perspective.

If you say he is wrong he'll say he is right no matter what period, he will get however delusional it may take it doesn't matter he is always correct period.

Say anything he doesn't agree with and he becomes angry immediately, also used to punch me when I was younger and he is 7 years older than me, he used to punch me to the point where I couldn't feel my right arm for hours and had a very hard time using it at all.

Now I'm older, stronger and I learned how I don't push his buttons.

He thinks we're "good" but doesn't realize the moment I move out I'll cut of any contact with him and if needed the rest of my family.