The people who reviewed the book poorly didn’t connect to the character or plot, or found them frustrating to read about. It’s just an opinion… you have your own opinion, and that’s great! We all perceive art differently, and that’s why we have such a huge range of plots to consume. Sometimes it’s not worth watching critical video reviews of something you really enjoyed, or sometimes a creator just has a very different way of looking at fiction in general and you’re not the target audience.