You introduced it by suggesting cancer a back ache were poor design. Perfection, in the context, would be the goal of a designer - something evolution doesn't have, but one would expect of a god.
If you think cancer and back ache are poor design and you believe your god designed us, then you have criticized your god's design.
What one would expect from design is the goal of the designer and yet here you are claiming to know what the designers goal is.
I actually believe God created the universe with aseity, the chance to make something of itself and evolution is part of that.
Again ,where are you getting the idea of perfection from? Please, no further evasions.