Jason is kind of meant to deconstruct the “heroes” from teen dramas like Riverdale and 13 Reasons Why, showing what would actually happen if some idiot teenager tried to get involved in a murder mystery that they legitimately don’t understand, which just results in even more chaos. It’s especially noticeable because Powell and Callahan actually try to do their jobs in season 4 (they obviously didn’t get very far, but they tried to remain professional and keep people calm), but Jason makes it much harder than it needed to be.
Ironically, Jason being portrayed as a villain makes him more sympathetic than the characters from those other shows, because at least we know that we shouldn’t root for him and we see his mental decline. It’s crazy that a show about aliens, alternate dimensions, and supernatural powers is more realistic than a “drama” about mental illness and suicide (hard to stay mad at Riverdale when the writers clearly just went off the rails).
