It’s been a long while since I read it, but each book got a little bit more pretentious with the author shoe horning his own world view into the readers face. That was annoying, but even more so because I recall disagreeing with his view quite a bit.
Also, each book was essentially the same plot. Universe works to keep the two protagonists apart, a bunch of fucked up shit happens, and at the end of the books they’re back together having learned nothing.
But the real issue I had with the later works was the very real Mary Sue of the two protagonists. Those characters just could do everything. It got boring and stale after a couple books of it.
I still hold Sword of Truth to be a good book by itself. And I do recall liking the next two books at least. But as a whole, I do not think it’s good storytelling.
No murders. Everything else you can apologize for.