Reduce unused JavaScript

you could try Load JS Deferred: Delay

Unfortunately it broke my website.

okay , you can try use the JS delay include option to specifically delay certain JS

or enable JS delay and exclude certain JS that breaks the site.

I am using Divi and i got to only one js file to reduce which seems to be related to jquery.

it looks like this:

https://www.mywebsite.com/wp-content/litespeed/js/2c64291dfdcee6fc038ce8b7b75b2d74.js?ver=fb862

I am still on Load JS Deffered: Defered

If I pressed Delay, then the site crash, I tried to exclude the following files i found on the internet here and here but still not working:

/jquery-?0-9.(.min|.slim|.slim.min)?.js
/jquery-migrate(.min)?.js
.dipi_preloader_wrapper_outer
/Divi/js/scripts.min.js
/Divi/js/custom.unified.js
/js/magnific-popup.js
et_pb_custom
et_animation_data
var DIVI
elm.style.display
easypiechart.js
/Divi/includes/builder/feature/dynamic-assets/assets/js/sticky-elements.js

you can try disable or bypass the plugin , check the page , it will list the original JS , then try to use the JS delay include with the given list , see if it works easier for you.