These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Complete Monster: Victor Brincat and Thomas Hentschel are portrayed as this. Carl inched this way as Brincat and Hentschel questioned killing Jason in front of his kids. Chris Flannerly in the prequal, though frighteningly, the Ax-CrazyPsychofor Hire was reportedly considerably toned down from how he was in real life.
Bandali Debs and Jason Roberts in the first of the telemovies. In addition to the Silk-Miller murders, Debs's senseless murder of Kristy Harty is enough to push him into this category. Roberts arguably qualifies in that he fired the first shot.
Jerkass Woobie: a lot of people felt Benji fit this trope; while he did a lot of awful things, his relationships with his parents, Roberta, and Roberta's kids made him very sympathetic, and a lot of viewers were very upset when he was finally killed, even though they knew it was coming.
Bob Trimbole also counts, especially when he gets cancer and realizes that Terry Clark is a complete psycho who'd soon as kill his lover, who Trimbole takes a liking to in terms of seeing her as a surrogate for his daughter (who he is estranged with).