I don’t think I had any problems like that with the writing of other fantasy series like Lord of the Rings and A Game of Thrones. Nor with two other trilogies I read for the first time this year, C. S. Lewis’s Space Trilogy and The Three‐Body Problem.
I also think it has a strong portrayal of complex, sustained trauma that is handled very well through the character of Vin. It’s something I think really has a great home in the YA genre while still being a fun page turner/action-y book.
I get what you’re saying, but I also just didn’t go looking for LOTR because I knew that wasn’t what this was. It’s somewhere between a fun summer fantasy series and LOTR. Not as thin as the former, not as rich as the latter. Pretty easy to chew through while also giving you something to savor.
Part of the fun is that all of his books interconnect, even though they take place on different worlds with different-but-same magic systems.
If you’re not sure if you want to commit to more, I’d his novella The Emperor’s Soul.