You are confusing fact with theory.
A theory is a theory is a theory. No matter how real it may seem to you, Evolution is still just a theory. And impossible to prove really.
You are confusing the scientific term theory with the connotation of the word. In science, a theory is something that has repeatable, verifiable evidence supporting it. There is nothing beyond "theory" because everything is always questioned.
Evolution has been proven in the sense that it has been observed in natural and laboratory settings. We cannot absolutely prove that it was the mechanism that created past/current species, but that is a logical conclusion to draw from the observations we have made.
So, if there are other theories that a large percentage of people believe in, they should be mentioned as well. That's how science works
Using the scientific terms, creationism is not a theory. It's a hypothesis. There is no empirical evidence that supports it, and actually quite a lot against it. Furthermore, it doesn't follow the scientific method in any way. When new, conflicting data is presented, it should be modified to take this into account. Instead, creationism is exactly the same as it was 3000 years ago, despite the fact that our understanding of the subject has massively changed.
But really, just because a large number of people believe something, it doesn't mean it should be taught as fact. Should we also teach that sleeping with a fan running in your room will cause you to asphyxiate, just because people in Korea believe it? Honestly, I think world religions, including Christianity, should be taught in schools, but if they're going to do so, it needs to be inclusive, and presented objectively. That is the problem here. Creationists want their religion to be given preference over science and all other beliefs, and taught as fact to children of all beliefs in public schools, paid for with taxpayer dollars. They can already teach their kids this stuff themselves or bring them to a church or Sunday school to be taught it. (for the sake of this discussion, let's not get into the ethics of that now.)
Besides, Darwin is proved wrong on a daily basis. People just keep getting more stupid.
Lol. Actually, one could argue that we have at least partially moved past darwinism. Because of advances in medical science, people who wouldn't normally survive to reproduce now can. It's possible to get genetic testing done to predict whether or not a couple's child will have certain issues. We've artificially bred a large number of species into something that would not survive well at all on their own. We've both destroyed species that should've survived and saved ones that shouldn't have. It's really quite awesome and terrifying to think about, that people have that much power over everything.
I know it's a joke, but regarding your statement: The theory of evolution does not necessarily create a more complex or "superior" species. All it does is create one that is very good at survival up until reproduction. Also, given the way our society works as of late, it's actually the dumber the people who reproduce the most.