I believe there is a typo in the title, its spelled "Peak Game Must Get Right Now 2" not "duck simulator 2"

Why the ♥♥♥♥ does this game have a genocide run

I mean it's free. The game itself is a fun little project that blends styles and has good humour. There's nothing particularly special about it but you can't fault a game that's cute, enjoyable, and completely free. I can't promise you'll find what you're looking for but there's no harm in having a look.