Why is it that every ranked game has at least 1 unhealthy champion?

Out of the 133 champions, there has to at least be one unhealthy, malignant tumor of a champion in each game.

I do understand that there are some toxic people by nature, but some champions incite that toxicity in people that are seemingly un-toxic. There is a level of frustration playing against champions like Teemo or Singed. Even if you win the game over all, there isn't a feeling of success versus these sorts of champions. Even if you beat them 1v1, you do whatever you can to keep intentionally seeking them out and killing them. Why is that? I'm sure we all have certain champions that we personally don't like. Why is it that when we are put up against them, we do whatever we can to exert our anger unto those champions? It doesn't relieve anything. There isn't a feeling of success or domination over that hatred. It is something deeply rooted. And yes, it is over a game.

It can also be from the perspective of the unhealthy champions side. What do the players see in these champions as opposed to other champions? Understandably they are fun, but is it their kit that is fun or the ability to effect the person past the computer screen? Are Yasuo players trying to prove themselves for themselves or simply trying to bother the enemy player? Is Teemo the little adventurer he is supposed to be, seemingly playing spy by himself or is he a champion someone picks up to intentionally bother someone?

These are genuine questions.