From a scale of 1-10, 1 being an angel and 10 being "Super Nanny" level demonic, how difficult is/was your threeager, and mind to elaborate?

My 3.5 year old DS has been good for a while but has started being difficult again. I am not sure if he came down with something or if it was because we switched classes. I want to know does this ever end? And is it just me? Care to share your experience?

He's been demonic the past 2 nights. He threw massive tantrums and just being all around unreasonable. Crying and crying nonstop. Today he peed on the carseat which he hasn't done since he was 3 years old. And he basically cried for half an hour and I told him if he doesn't stop I wouldn't get him out. But he just kept on crying. After he finally calmed down I asked him why did he threw a tantrum he said "because I like it.". Excuse me????? It drove me mad.

However, he is usually a very very good and sweet boy, he never acts out at school according to teachers. He also never does that to babysitter. He only does that to me. So normally he'd be a 2-3, and when he goes crazy he reaches a 9-10, so I gave him a 7.