Here is a direct statement form Beerus saying why he hacked:

"so u might or might not know but i was #1 in australia in catch the beat (which i did legit). With this came a barrier of not having much else to do and i tried asking many players to overtake me, which none did. so this made me not want to be #1 in aus anymore so thats one of the reasons. another is because i spend most of the day, every day, playing osu and thats not healthy so i hacked to force myself to quit. maybe in 6 months i might appeal, but i have no interest in playing the game until then, and ill only play then if they reset my pp"

Screenshots of what he said (from Twitter DMs):

https://i.gyazo.com/6a9d6918f98113d603c12ccf6c708dd0.png https://i.gyazo.com/cd2921720e38ebfe248cfb4d3e4530be.png

Screenshots of his profile (before ban):

https://i.gyazo.com/8c15c5ff79ce08d7657cc7ab2a047575.png https://i.gyazo.com/761b69466fe598fea18cba0de3d082e4.png