Kind of like how you'll find a lot of terrible parents in anime, you'll also find some terrible anime teachers. Teachers are very important because not only are they educating the future generations of tomorrow, but they're also responsible for the safety and wellbeing of the child for approximately eight hours. If you take a closer look at certain anime, you'll realize that a lot of these fictional teachers would get fired in real life. The worst teachers in anime show up in all kinds of different series, from Erased to Card Captor Sakura.
Whether these awful teachers are murdering their students, hooking up with their charges, or just being super cavalier about getting their jobs done, a lot of these anime teachers should totally get fired. The abundance of lousy educators really makes you wonder - who is hiring these people in the first place, and why haven't they lost their jobs? Take a look at the list of anime teachers below and vote up the ones who definitely need to be kicked out.
Koichi Shido is a teacher in High School of the Dead. As you may have guessed by the name, this school is overrun by zombies. Given the chaos that this kind of problem invariably causes, he's probably not getting fired any time soon, but in the real world, he would be. Why? Because he's a self-absorbed piece of sh*t who only cares about himself.
No reasonable person expects teachers to sacrifice their lives for their students, but for a teacher to use their students as a human shield during zombie attacks? Despicable. Shido also brainwashes his students into killing each other and having orgies so that they can produce babies to repopulate an earth ruled by him. And you thought your high school teacher was bad.
Gaku Yashiro of Erased is probably one of the worst teachers in anime history. No, he didn't assign too much homework or give the protagonist a failing grade that he didn't quite deserve. What he did was much worse: he systematically kidnapped and murdered his students. This is one teacher you don't want to leave your kids with.
If you haven't seen Assassination Classroom, you might think that the bad teacher was the giant yellow tentacle monster who claims that he's going to destroy the earth unless a group of middle schoolers can stop him. You would be wrong. Koro-sensei, the aforementioned tentacle monster, is actually an exceptionally good teacher.
However, the same cannot be said about Gakuhō Asano, former teacher and current principal of Kunugigaoka Middle School. Principal Asano's system of running his school is terrible. He created a ranking system where the lowest scoring students, called Class 3-E, are treated significantly worse than the rest of the school. Not only do they have to live in a subpar building far away from the main campus, but the better scoring students are encouraged to bully them.
Principal Asano really doesn't want these kids to bring their grades up, either. He goes as far as personally teaching most of the school college level coursework and excluding Class 3-E from the lessons, but still testing them on the material. He maintains this system because he believes that having someone to look down on and discriminate against will encourage the rest of his students to do well. So, not only is he training most of his students to be bigoted jerkbags, he's actively stifling Class 3-E's ability to learn - the opposite of his job's purpose as an educator.
Yu Yu Hakusho actually has two teacher characters who are terrible, but because one of them actually does get fired, let's focus on the one who should have been kicked out as well: Mr. Iwamoto. Mr. Iwamoto hates the protagonist, Yusuke Urameshi, so much that he's actively trying to get him expelled. Secretly hoping to get a problem student out of your hair is one thing, but actively taking steps to make it happen is quite another.
This dude tries to frame Yusuke for stealing a pen, convinces another teacher to change Kuwabara's answers on a test so that he can punish him for poor grades, and is genuinely happy when Yusuke dies. Some fans have speculated that he might actually be a demon, which could explain his truly irrational hatred of a poorly behaved teenager and why he isn't fired.