Again, creationist falsely assert that evolution predicts a direction of change or a specified outcome.
Until you get past that misunderstanding there is no hope.
Their basic assumption is that Adam was created with perfect genes and ever since the gene pool has degraded.
There second assumption is that evolution is impossible because "evolution requires that the gene pool" (of humans) is constantly improving to perfection thus in conflict with their Biblical interpretation of life.
Let's look at the fossil record even. In each epoch we seem to see that a set of animal species fill each niche and that those niches are similar to today's fit of species to niche.
Yet plants never seem to have evolved into any niche that required independently directed motion.
And sexless organisims never seem to have evovled much at all -- yet they have avoided erradication by animals or plants competeing for their niche.
There is one HYPOTHESIS -- hard to raise it to the level of theory -- that the random mix of natural physical processes operating under strict darwinistic evolution would for complex and subtle reasons unknown at this time result in such a current state. That is a HOPE, a FAITH, a BELIEF SYSTEM.
It is unproven. It is not a reasonable projection of more proven and evidenced theory either -- not reasonable, that is, if it is asserted as the ONLY reasonable projection.