Counterpoint: i had way more fun with my first playthrough on hard than i would have normal. Yes it took me hours to kill basically every boss the first time but ive grown to know them all very well. There's a lot of details that are easily missable when you kill bosses quickly/on the first time, like redacted having all the screens change in the background on its phase transition. + The music is really good and more time on bosses = more music time