It's full of regurgitated fantasy tropes, the writing and characters seem simple, and there's a forced world building with what feels like an infinite and boring back story, with no movement to justify it.

Maybe it's because he published 7 books that year (2021). Maybe it's also a coincidence that I remember not liking Children of Memory and he published 6 books that year, compared to Children of Time which was 2015 / 2 books.

Also just checked and looks like the fourth book (Children of Strife) is releasing in 2 weeks!