Game frames per second is confusing

i’va been playing with a village that has around 25 hearthlings and my game speed unless super zoomed in (or super zoomed out) lags from 60 fps to around 15 fps and i would like to say i have a pretty good 800 dollar computer with the worst part of it being deticated graphics ram on my graphics card which im going to upgrade soon but anyways the games lag is confusing to me considering the game isnt exactly the most detailed graphically will this be fixed/addresed soon or…?

You need a better processing unit; graphics has nothing to do with it but they are always optimizing the game