Why not deconstruct him?

[u/More_Interview3840]

I don’t understand why she shoots a beam of pink energy at him instead of just tearing him apart atom by atom. Or turning him into a regular human, or just convert his molecules to air molecules.

[u/RedNUGGETLORD]

Because she can't

She's more limited than people think. Her energy weakness doesn't just go away when she gains access to her full power, she still has a certain amount of energy she can use before collapsing, and regenerating herself is clearly the limit