I am the talentless villain in Apocalypse but I created the system

On the first day of the new century, everything changed. Vortices started to appear around the world, mythical energy, which had disappeared for countless years, reemerged, and zombies began to manifest all around the world. The apocalypse arrived, and the end of humanity seemed near. But after years of battling the monsters and finally emerging victorious in the apocalypse, humans realized that the war they had been fighting for years was mere child's play compared to what came next. They discovered that their world had connected with countless other worlds, forming a giant planet teeming with numerous races, and now, even more wars began to erupt. And many protagonists emerged throughout all the races. As for me? I reincarnated as the talentless villain, but the thing is, I accidentally created the system!