Zhuge Jun was beside himself with frustration; he had now entered a vicious cycle.
"I can't beat the boss!"
"Then you should first execute a perfect move in the first three minutes, making the boss enter simple mode!"
"If I could execute a perfect move in the first three minutes, do you think I'd still be unable to beat the boss?"
You have to understand that although the boss's second phase has some changes, such as igniting its entire body, most of its moves are still the same.
In other words, if Zhuge Jun wanted to execute perfect moves at the start, he'd first have to familiarize himself with all of the boss's moves and essentially manage to handle them all with ease.
Not only would he have to stay unharmed, but he'd also need to take advantage of every opportunity to sneak in damage during those safe moments to enter simple mode.