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.
Base Breaker: Albin. Some fans like him and think he brings out the best in Karine, while others think he's a controlling bastard and Karine's change wasn't really her own choice.
Some think Karine was right to dump Dan because he didn't trust her, but others argue that with all the evidence against Karine and Dan being manipulated by Melanie and his friends it was understandable that he wouldn't trust her.
Cross the Line Twice: Some of Vicky and Jenny's antics are downright homicidal. This is played for laughs...usually.
I Knew It: A real life and in-universe example in volume 5. Both Dan and some readers suspected Albin was manipulating Karine. Albin convinced Dan he was wrong, but in the end it turned out these suspicions were justified.
Les Yay: In volume 6, between Vicky and her new neighbor.
Moral Event Horizon: Melanie may have crossed it when she tried to frame Karine for trying to poison her, just to keep her from exposing her lies.