How do I Download 10.12 Sierra without appstore

Hi, I recently updated my macbook to 10.13 high sierra.

High Sierra IS HORRIBLE, 60% of my games dont work with it plus trying to log in is really slow, and drains my battery faster than any other OS I have installed before, I have restored my Mac to Yosemite, But how do I get Sierra (Before I was able to download it from my purchases but now it has disappeared from my purchases.

Is there another server/place where I can get 10.12 Sierra