Well first suggestion (not related to Slide Anything) is that your page size is huge -its 35MB – see:
https://tools.pingdom.com/#5ab0091cbb000000
With some image optimiztion, you should be able to get it down to 5-10MB and it will load way quicker (try 80% JPeg optimization, and no images need to be over 1920pixels wide unless you want a zoom feature)
Regarding Slide Anything, I see that you do have a JavaScript error on the page – press “CTRL” + “SHIFT” + “J” keys together to show the JavaScript Console. It’s occurring in a file “countries.js” which resides within your Child Theme – so maybe try disabling whatever this feature is to see what happens.
Other things to try:
1) Uncheck the ‘Loop Slider’ checkbox
2) Checking the ‘DOMContentLoaded event’ checkbox (under Other Settings)