>Do you have any evidence that Chimps and Humans are not related?
Yes. I have a more developed brain than a chimp. Don't look or act like a chimp. I can type and read and speak and reason - something a brainless chimp cannot do.
I do believe the question is one of being a close relative not an identical twin. We are indeed the smarter cousin but the difference is one of contingency, we happened to become upright, freeing our hands for all sorts of manipulation, large brained and had our palate change enough to facilitate language. The chimps may have been upright walkers at the point of human/chimp separation but they lost that and never developed the palate and brains we did.
Even so, chimps are capable of learning, communicating and using tools. The division between chimps and humans is one of degree not essence.
In any case the evidence of transitional fossils, morphological similarity and molecular evidence trumps your - we aren't related because we are a little better than them.
My brain is more developed than my child's brain. I don't look or act like a child (usually). My child cannot type, read, speak, or reason.
According to your logic, apparently my child and I are not related.