Is it really wrong or messed up to enjoy torturing bugs?

You say you're sensitive and that you feel bad about what you're doing, so I am almost certain you're not antisocial. I'd say maybe you have sadistic tendencies, have anger issues deep down, frustration, might be interested in anatomy, or have hatred for certain animals. I am very empathic, but if I ever encounter a giant mosquito I will torture that thing for all of the pain it's friends have caused me!!!