I notice that I feel a sense of happiness when I see someone upset.
I often even start arguments on offensive topics just to upset people.
I am even ready to bring shame and failure to myself just to upset someone else.
I think its due to all those violent cartoons I watched as a kid.
The main premise of those cartoons was always in a sense of "When this character is hurt, I am very happy.".
I think some of that got copied in my brain, so I get pleasure when people are upset.