Best walking simulator ever

This game was really good optimized but every update my fps got worse and worse I could play this on high and get 50-60 fps but now i can barley play on low and get 30 fps even black ops 3 I get better fps. No only is it poorley optimized the game is so bad like everyone is running around with 1 hit guns and you have like a trash gun that takes more then 10 bullets to kill someone literally