I'm a teacher but I secretly love it when my students lose their temper.
Does this happen often?
Yes and I'm happy that my three most bothersome ones left my class
As a teacher you're expected to have empathy for your students. Being happy that someone is upset is terrible sociopathic. Have you thought about another line of work instead?
I take my job as a teacher seriously, but I just happen to find enjoyment in them being upset. Those bothersome kids just need to be taught a lesson.
You may take the teaching part seriously, but you don't take the empathy part seriously at all. As a teacher your job is to educate and be a person, they can feel safe and comfortable with. Instead of enjoying when they get upset find out why they are and see if you can do something to help.