It's written with a different focus than traditional western sci-fi. Pacing is different, characters are unexpected in certain ways, etc. I can see how people don't like the style, I personally enjoyed the 'something different'.

Some recommendations based on that: The Forever War trilogy is IMO the best "future war" mil sci fi series.

The standalone book Old Man's War is also incredible.

And of course....Hyperion is the king of the entire genre. If you haven't read those I'd highly recommend it, will change your life.