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.
Arc Fatigue: Some critics have applied this to the Black Lamp Society and Samhain arc. Possibly lampshaded in Super Sidekick Sleepover Slaughter:
Cassie: "I don't know about you, Vlad, but I'm getting really bored with this black flower crap already."
Complete Monster: The Big Bad is Akakios, AKA Samhain. At first he is a man with Laser-Guided Amnesia and a Dark and Troubled Past who is an ally and later lover of heroine Cassandra Hack. After a series of events, however, it is revealed that Samhain is the original "slasher," Akakios, founder of the evil Black Lamp Society. Regaining his memories and true personality, Akakios is disgusted by his former self's feelings for Cassandra, reasoning he could have taken her any time "whether she wanted it or not." Akakios forges the undead slashers into a fighting force and systematically kidnaps or kills everyone Cassie loved, purging the upper echelons of the Black Lamp Society for being "too nice," despite their own atrocities. Akakios plans to spread the slasher disease, turning innocent humans all over the globe into murderous monsters.
For a slasher example, there's Ashley Guthrie. While admittedly amusing here and there, he's still a childsociopath who, even before he became a member of The Undead, did things like strangle a litter of kittens to death (he was annoyed his cat was spending so much time with them) before caving his baby brother's skull in (he was annoyed he was always playing with his toys). After becoming a slasher, his first acts were to cause his father to commit suicide and drive his mother insane. His very first appearance has him killing a little girl in a dream (similar to Freddy Krueger).
Dr.Andrew Rodin stands out in the franchise by virtue of not even being a Slasher, just a normal human. The admittedly sadistic Rodin is the most vile human member of the Black Lamp society, using his scientific genius to create women for the sole purpose of being sex slaves, which often end up abused. He creates other species for the sole purpose of killing others and brutally slaughters a co-worker when she objects.
Fridge Horror: The only major characters who initially get killed by Akakios's mass attack on Cassie's friends are Chris and Lisa. Who got murdered by Dr. Gross. The guy who specialises in long and sadistic physical and mental torture...