See this tree? This is the actual evolution not what was on the first picture.
Humans & Chimpanzees had common ancestors.
For some reasons (for instance, changing the environment), two species evolved.
And, to ask, “why didn’t all monkeys turn into humans?” is pointless and completely illogical. WHY WOULD THEY?! Evolution doesn’t explain monkeys became humen. Evolution says humans evolved from common ancestors (and they don’t exist anymore, because they evolved into humans and monkeys and other species.). Now, if after all of these, your argument against evolution is “my ancestors can’t be apes, you crazy scientists!” then I have nothing else to say.
You are a god and your ancestors can’t be apes.
Good for you. Just stay away from us. Also, an advice: read some books, you might get educated eventually…