I haven't read the full manga but this anime of 25 episodes is really hardcore R-rated series. It's easily one of the darkest series. I don't want to spoil but you have to watch it completely all 25 episodes. Look out for the ending, it's disturbing. For some watchers it might be slow at some point but it's necessary for character moments and build up so be patient, great things takes time. I have to say it's music is something else, I really love guts theme. It's different but still it hits hard. It's animated but please don't watch it in front of kids.
NOTE: it's only my thoughts and if you don't agree then it's fine. Calm down, world isn't ending.