He kind of has both I guess? Thinking he is superior to everyone, but meeting someone he recognize as better than him...
I personally want him dead for ruining another's life tho.
Well the reason he hates feeling inferior is because he has a superiority complex. He thinks he should be superior to everyone. And if he thinks he falls short he will do anything to make sure he gets back on the top. That includes ruining *innocent* people's lives. I emphasize "innocent" because, if Jayce had suffered from an inferiority complex, Aiden would most likely not have been so innocent even in a similar situation.
Interestingly enough I want to kill Jayce but not because he has an inferiority complex but because he had a SUPERIORITY complex.