en_tn_lite_do_not_use/2pe/03/06.md

through these things

Here "these things" refers to God's word and water.

the world of that time was destroyed, being flooded with water

This can be stated in active form. Alternate translation: "God flooded the world that existed at that time with water and destroyed it" (See: rc://en/ta/man/translate/figs-activepassive)