The Sketchbook wasn't trying to turn them evil but trying to prevent it she even says herself after, now let's all agree to never be creative again. She even appears at the end of Don't Hug Me I'm Scared 6 when the Fathers Day curse is lifted.
Red Guy sings the creative song in front of the crowd he thinks she's a good friend. She destroys the clown painting thinking it'll turn to a killer clown, she says green is not a creative color just pointing it out not saying she hates it if she does we don't know why.
When Red Guy summons all the teachers the Notepad isn't their cause Roy Dosent want her cause she's a rebel against him, she's supposed to harm them but she didn't.