I struggled a lot with the magic system. It went to such a bigger scale compared to the first and second book that at this point I had more questions than it was possible for the author to explain without compromising the story and it kept taking me out of it.
Characters were never ones I deeply cared about, so when all of it adds up I just had the urge to DNF the whole 37% I read. I was resisting because it's a conclusion to a series but I just could not care less and it alredy made me slump for 2 weeks so I'll just stop now.