Did something change after 5?

I loved the first five books, then come 6 I felt like there was a giant shift in the writing, and now at 7 I’m feeling like there’s a different author or if I’m even in the same series. I’m going to finish, don’t get me wrong, but I just want to know if I’m crazy.

I looked up certain words being used - like one specific one to describe men’s nether regions and it wasn’t used at all in the previous books. Then in book 6 and 7 it’s used like 65+ times. I looked at old spicy scenes from the first few books and they were a good buildup, now they’re written like a horny teen sext.

Were the first 5 books the best written things I’ve read? Of course not. But they were captivating, descriptive and I felt like I was immersed in the world. But now I feel a little confused on scenes and like I’m reading poorly written smut.

Anyone else feel a shift? Am I crazy?