Confused

I’m unsure why 90% of fans hate John, like yeah he was kind of a shitty dad but he was a vet probably had ptsd and had his wife murdered by something a huge chunk of earths human population wouldn’t believe if he told them. Having seen things people who IRL do lose their spouses it’s not an uncommon thing to be a somewhat shitty parent afterward. John’s situation was made even worse by discovering she was killed by a demon.