If asked if the world is "good," Christians will say "no." The "good" of Genesis 1 is somehow seen as over.

This ignores references like 1 Timothy 4:4, Romans 8:28, etc. And you're wrong—the idea of "cosmic badness" does not rely on the cursed ground of Gen 3:16, which was reversed in Genesis 8:20–21.

The "cosmic badness" was made up by the religion and has no biblical reality.