*SPOILERS*
Don't read if you don't know the story,
S1 is also not proper when i rewatched it after reading the manga i noticed that the Kankei torcher scene was of 10 days but in the anime it was too short, it was only 1 or 2 eps, not even full only of 4 or 5 mins, they even cut scenes from the manga which made it less horror, the manga was able to freak me out just as ep1 but the torcher scene was just skipped. Also it is not shown in the anime how Kaneki turns to Sasaki, it is Not even shown Kankei eating Hide's face also Arima smashing his eyes.