The only things I disliked about the novel were how MC ogling at the empress all the time. Her content took about 60% out of over 1000 chapters I've read. Other girls were neglected.
The other thing was MC's power move:
@ShinSekai I have a feeling that the author has been dragging the story out so that he could earn more money. I mean, there is no author that would be this unreasonable.