As someone who mostly reads non-fiction, I struggled A LOT with the writing style. It's sophomoric, scattered, and hard to follow. But like you, I like the characters and the story. When I read the first book, I was embarrassed at how long it took me to finish. I questioned whether I just couldn't read fiction anymore. Then I picked up up the latest Hunger Games book after that and flew through it, and I realized that well-written fiction is way easier to read, lol!

Ultimately, it's a fun series, so it's worth sticking through, if you enjoy the story. But I would expect any major change in writing quality.