You have observed a clone by reproduction? Evolution is small changes and differences whether by reproduction or nature. There are ~6.7 billion people on earth. Which one is a clone? If the purpose of sexual reproduction is not to produce slightly changed and different offspring, what is it's purpose? To produce clones?
Such a thing is an impossibility.
That the impossible does not occur, is neither an argument for evolution, nor an argument against anything else.
Sexual reproduction, in and of itself, does not infer evolution, and to suggest that it does is simply absurd...like it or not.