Capturing Max-Level Monsters, I Become Invincible Under Heaven

Gu Dong accidentally transmigrated to another world where Beast Tamers reign supreme. His biological parents buried him alive. His own demon beast sabotaged him, leaving him the worst of the worst. His biological mother ruined his marriage prospects. How will he rely on his own abilities to escape his misfortune? (I have no idea how to write this. Come in and see for yourself!)