Hello,
Take our apologies for the delay in answering!
1) Please, install the necessary extensions https://prnt.sc/v3p4ja We need to generate thumbnails for the products because at this moment it takes the original full-size images and it caused the speed issue. Once you install these extensions go to Tools > Regenerate Thumbnails > regenerate all the thumbnails.
2) Don’t use such many products per page http://prntscr.com/v3ooaf Set 20 for example, then you get page loaded much faster.
3) Also, we could offer you our XStore theme https://themeforest.net/item/xstore-responsive-woocommerce-theme/15780546 instead of Legenda theme. XStore is more optimized and customizable.
Regards