Jay Wesley Richards explains why theistic evolution is an attempt to join incompatible ideas. The view requires redefining one of the terms, which fundamentally changes the terms.
Either God designs the details, or nature shuffles the deck and natural selection chooses the winning hand. The mechanism is either conscious and intentional (design), or unconscious and unintentional (natural selection). Creation is teleological; it has a purpose, a goal, an end. Evolution is accidental, like a straight flush dealt to a poker rookie.
Theistic evolution means design by chance. That’s like a square circle--there is no such thing. Blending Darwinian evolution with creation is like putting a square peg in a round hole. It just doesn’t fit
Here's a past issue of Solid Ground that goes into detail on the subject.