Romance novels have always been about the sex. There is a spectrum of how explicit you want to get, from vague and abstract to really explicit porn. Most famous romance authors are somewhere in the middle. There’s also a spectrum of how the characters treat each other. From super sweet to traditional hero/heroine to kinky to abuse / shock porn. If you are getting more of one thing than something else, then it’s probably got more to do with your choices than the genre. Read what you want.
I do think the ending is epic, especially since it’s a book about vengeance. But it also gets sentimental. However it’s possible that you just don’t like the book. The meandering and side stories is one of the things that make it so beloved, similar to Don Quixote or Moby Dick. But that’s also something that can be annoying to people who want a more straightforward story, especially modern readers.