I disliked Dark Age. Should I keep reading?

I just finished Dark Age, and to me this was a real low point for the series. For the first time in any audio book, I found myself listening at 1.5x speed just to get through some slow sections. My overall thoughts can be summed up by a few points:

- The beginning and end were good, but not great. I enjoyed the back-to-back Darrow and Lysander chapters, but the never-ending action grew stale.

-I didn't care at all for Ephraim and Lyria chapters. These characters, paired with the whole Volsung Fa felt like a weird side quest that didn't meaningfully progress the plot in any way. I almost DNFd the book several times trying to get through these sections.

-Mustang's POVs were good, but bringing back the Jackal felt cheap and unnecessary.

-I think this series is at its best during political twists (loved day of red doves) and smaller moments between characters. This book mostly abandoned these elements and replaced them with bigger set pieces and battles.

If books 1-4 were 5/5, I'd give this a 3/5 at best. Given my reaction to dark age, should I keep reading, or is Lightbringer going to be more of the same?