I Have a Training System

The protagonists in the novels I read before were mentally strong, brave, strong, upright, kind, and wise. . Either he knows history, he is good at mathematics, or he is good at physics and chemistry. He is not a doctor or veterinarian, he is also a retired special forces soldier, or at worst he is a college student. It makes people feel that you are embarrassed to travel through time without any skills. The current protagonist is a fool, a waste, a scumbag, and a hypocrite. He uses a system to easily gain power, so he is righteous, and everything he does is right. After robbing someone's wife, no one is allowed to resist. Is there anything to look forward to in a novel that makes people feel that even a pig traveling through time with a system can be invincible? . It's not that I hate system writing, I just hate that I can't write the feeling of being invincible at the beginning like One Punch Man, so don't be so stupid. .