Who is meg to blame for the loss of Charles wallace? Why?

Meg blames My. Murry. Soon, she fills up with anger, realizing that "she had found her father and he had not made everything all right. Everything kept getting worse and worse.” Mr. Murry tries to console her and tell her that he is not a perfect person, but Meg only gets angrier and angrier and accuses him of almost letting the Black Thing get her. Meg feels a piercing pain through her body.