He has a pet which is not entirely loyal which grows at a faster rate than he does. If you can imagine all animals, insects and etc... mutating and targets humanity with albeit a weaker growth rate but still plenty fast, you can just kiss your sorry ass goodbye. Imagine rats, ants or any insects mutating at a fast pace. Just how would you even prevent them from mutating or reproducing. So MC's OPness is probably the worlds way to maintain balance. Just like some games, where the devs release OP heroes to maintain balance. If all heroes are OP, then in a way isnt it still balance?

MC kills the pet of a kid randomly in a street. The pet will mutate so he prevented a disaster but to do it infront of people is a little... He also created a post in a popular forum stating the incoming apocalypse and even stated that he is not lying and that it is not an alarmist post. Who would believe that! Still if I were in his position it would be hard to convince people that the world is ending. He also included a strong and simple breathing exercise which humans can use and practice to awaken their Qi. I was surprised here to be honest. I havent seen an MC giving some strong exercise to help resist the apocalypse. At most, the MC tend to get stronger alone while leaving the others to fend for themselves. This action made me laugh cause it was funny on how he did it but also showed that he cares for humans since he is doing his best to warn and strengthen humans fighting prowess in his own dumb way.