The Life Of A Billionaire's Lickspittle

Living as frugally as possible, peddling multiple part-time jobs, and living his life paycheck to paycheck, Yang Yu did everything to Carter for himself and his girlfriend, whom he had chased for up to three years. This is why he was incredibly shocked when she abruptly ended their relationship due to his financial troubles. Yang Yu was devastated and was on the verge of a complete breakdown when he miraculously awakened the "Counterattack system."
Besides boosting his overall physical stats and attributes, the system also grants Yang Yu various incredible rewards for completing various tasks on the condition that he remains living his bottom-barrel, deadbeat life as a loser; of course, to Yang Yu, it's definitely worth it.
With the Powers of the system, Yang Yu can finally get a semblance of order back in his life, but most of all, Yang Yu can finally get his revenge on his greedy Ex-girlfriend who dumped him.
What sort of crazy scenarios will Yang Yu face as he navigates life with such a powerful system? What kind of rewards and perks will Yang Yu obtain from the system? What lessons will Yang Yu learn as he uses the system to get ahead in life?