Should we believe the “Big Bang” is the genesis of Creation?

No. Personally, I believe Elohim the Father (Genesis 1:1) commissioned Elohim the Son, Jesus Christ (John 3:35; John 1; Hebrews 1), to take elements from the unseen Spiritual Realm and fashion those elements into matter that can be apprehended by a life-form constrained by Time and physics (Hebrews 11:3).

I believe the creation narrative, as articulated in Genesis 1 of the Canon of Scripture, was for cause and in response to an unfathomable coup d’etat in the Realm of the Spiritual, a coup initiated by an anointed cherub angel later to be identified as Satan, a deceiver, (Genesis 3; Ezekiel 28:11+; John 8:44; Revelation 12) and that destructive war was removed from the Kingdom of Elohim where nothing impure is permitted to exist therein (Rev 21:27) and this present Earth and the Realm of Time created as a temporary repository for that war and its spiritual participants partially constrained by Time and physics; this, while humanity is simply a player/created participant in this spiritual war between good and evil/Jesus v. Satan; in fact, the primary reason Jesus the Messiah entered Time in bodily form was “to destroy the works of the Devil” (1 John 3:8b) via a battle strategy introduced as “The Gospel” which was ordained “before Time began” (2 Timothy 1:8-10) and that battle, a cosmic struggle between good v. evil, Jesus v. Satan, was first pictured for humanity by the Holy Spirit in Genesis 3:14-15 and Genesis 3:21 and expounded upon by Messiah in the Gospels and His Revelation to the Apostle John on the Island of Patmos in 90AD.

All of the strife, wars, horror, death, disease, that have transpired over the previous 6000-years find their genesis in the Realm of the Spiritual before Time began and this struggle is currently being played-out before our eyes; tragically, only a “few” have eyes to see and ears to hear what the Spirit is teaching us as only a relative “few” will trust-believe in Jesus as Messiah and find life and knowledge in His Name (Matthew 7:13-14). Jesus is victorious (Revelation 5:5).