Genesis tells me Who. The origin of Species tells me how.
You really trust old Darwin to God's Word that tells us not only who, but how long it took Him to do it. I trust the One who did the creating, who informs me through His Word about the details.
What some Christians do not understand or acknowledge is there is an enemy, Satan, who is over hosts of demons, who is the prince and power of the air. He is able to and keeps many of the people of the earth blinded to truth. He has had 6,000 years to prefect his craft. The institutes of the world are largely under his control. He is a consummate liar and works day and night making sure lies that undercut the glory of God are propagated throughout the world's systems.
You would expect such beliefs as the the belief in evolution, which is contrary to The Word of God, to be accepted in a world held largely under his sway. You would expect the institutes of the world's system to have lies embedded into their very foundations that undermine the truth of the power and glory of God in creation.
The thing the Christian must do who understands this is to be very careful about what is being presented as fact by a basically evil, anti God world system. Believe the Bible first. If you do and honestly investigate you will find myriads of evidence that support Biblical truth, providing of course, you pray and ask God to remove any blinders that the evil one has plastered over the eyes of your soul and you do the research.
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Exodus 20:11 For [in] six days the LORD made heaven and earth, the sea, and all that in them [is], and rested the seventh day: wherefore the LORD blessed the sabbath day, and hallowed it.
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1Jo 5:19 [And] we know that we are of God, and the whole world lieth in wickedness.
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2Cr 4:4 In whom the god of this world hath blinded the minds of them which believe not, lest the light of the glorious gospel of Christ, who is the image of God, should shine unto them.
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Eph 2:2 Wherein in time past ye walked according to the course of this world, according to the prince of the power of the air, the spirit that now worketh in the children of disobedience:
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Jhn 8:44 Ye are of [your] father the devil, and the lusts of your father ye will do. He was a murderer from the beginning, and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it.