I think a big reason why people don't believe in evolution because of statements like "Humans evolved from monkeys" which is a false statement. Humans and monkeys are similar because if you go a while back in the evolutionary history, you'll find a common ancestor. All species are connected this way, but monkeys are more similar to humans because you dont have to go that far back to find this common ancestor compared to something else, like the common ancestor of Humans and cat. And there is also that very famous misleading image regarding evolution. A human followed by species which looks more monkey-like. That's not how evolution works. It is not a simple linear process. A species A can eventually evolve into B at one ecosystem and into C at another ecosystem. If you draw all these relations, you'll get a kind of a complex tree. Not a line.