Awful Page Load Time

Hello,
When i need filter plugin i always choose this plugin till now. Because i have created book store almost 7k products i have.
I’m using siteground woocoommerce plan and it really fast normally but when i search products or when i visit store/category page woof prevent loading page rapidly (almost 30+ seconds loading time). My customers complaint always so slow when they search something and i lost a lot of money for that.
I do not blame to you, probably there is a few tricks for this situation but i could not find any magic on this page: https://www.woocommerce-filter.com/searching-is-slow/

I just activated cache options in advanced but no luck for me.
Hope you help me for that
Thnx