The System's Obsession Made Me Paint You a Portrait

The protagonist, Li Jue, transmigrates to a parallel world, where the System wants to train him to become the greatest painter under heaven! But becoming the greatest painter under heaven is easier said than done! “Other people's Systems shower them with experience and skills, but mine's a total joke. It keeps making things ridiculously hard for me. I can't take it anymore!” [Ding! The Host's resentment has risen. To reduce the Host's resentment and encourage ambition, the requirements for paintings have been raised. They must receive an A+ rating. Penalties are doubled.] “????” “I'm done painting!!” [Ding! The Host's resentment has exceeded the limit. Rewinding time now. Countdown: 3, 2...] “Fine, you win!”