There’s definitely a lot of authorial self-doubt about, evidenced by the way five star reviews are triumphantly trumpeted whilst one star trolling prompts hand-wringing and wails.
A few months ago I reviewed a thriller, The Source by Zach Abrams. It is a well-written lighthearted romp with occasional depths, and I enjoyed it very much. O.K., the plot may creak a bit in places, but so does ‘Othello’. I’m a generous reviewer (There But For The Grace Of God Walk I), and I gave it five stars. When I was posting my review, I had a look at the one star review for the same work, by an Amazon Top 1,000 Reviewer, no less. This was not your average trolling one-line ‘It stinks’ effort, but several detailed paragraphs. The reviewer had clearly read the book, described bits of it, and then written ‘it stinks’ after each snippet.
My conclusion; the author had majorly pissed off someone who then decided that this was the best way to put the boot in. After all, both Shelley and Byron thought Keats expired in reaction to an unfavourable review of Endymion in the Quarterly Review. Fortunately the author concerned is made of sterner stuff.