I Wield the World's Core Technology, Yet I'm Always Forced to Play the Villain

Ou Mai holds eighteen patents and has amassed billions at a young age. He decides to retire early. But just as he hefts his time machine and prepares to take a solo trip, an unexpected phone call interrupts him. Childhood friend: Mai, the System you developed has been used by terrorists. The higher-ups want you to come up with a solution. Ou Mai: ... (Not my problem.) □□: Build me a device that can brainwash people. Ou Mai: ...I'll brainwash you first, damn it! Unable to get any peace from then on, Ou Mai finally snaps and flips the table. I'm only trying to have some fun! Stop pushing me! (╯‵□′)╯︵┻━┻ P.S. Note left on 2019/8/24 Theme: Technology saves the world