The story was quite compressed since it only got 13ep. It's a bit like Jojo, some people will tolerate the unique feeling around the series, and cherish it/ love it. And ofc there are people who will hate it, either it is because of the slow pace, the fragmented flashbacks or the characters... I personally enjoyed it, and i hope people would give it a try. (If you want to watch a gory/ action anime and doesn't get sick of insects).