If God's statement that man is created in His image and that God Himself breathed life into man is a lie, if the reality is that we evolved from pond scum, then every other thing that God has told us in His Word has to be questioned.
Fortunately, so much Scripture has been shown and proven to be absolutely inerrant and correct, I don't have the dilemma you posted.
I have every reason to believe God and doubt man and man's ever-changing theories and beliefs.
That was the conclusion I came to as well.
Even if God used animals from which to evolve humans, there's still the problem with Gen 2:7 in that it says that man became a living being. Animals are already alive, so that comment would be totally unnecessary. Adding that comment very strongly implies that the man created from the dust of the earth was not alive before that moment.