When writers stoop to criticism, that is when their ego show through (like a searchlight!) As a rule the more pretentious provoke the most scathing repartee ! As for the criticism of Ms Rowling by Mr Bloom, I have read her, not him and I believe he would like to have her revenue. As well, Mr Shakespeare in his grave last better than Mr Shaw!
Harold Bloom isn’t a writer of fiction. He’s a critic and scholar.