Yep, clearly needs help if that's his biggest hurdle in life. OP there are hundreds of millions of people more successful, more intelligent, more conventionally attractive than you and your sister, so why narrow it down to just her?
A little resentment can be fuel to improve, however, wishing that she failed at multiple steps is a self-destructive mindset because those moments in her life have already occurred and there's nothing you can do to change that other than going full-blown school shooter.
A little resentment can be fuel to improve, however, wishing that she failed at multiple steps is a self-destructive mindset because those moments in her life have already occurred and there's nothing you can do to change that other than going full-blown school shooter.