How to remove an arrow which is placed before the icon?

Please provide a link to your site and I can give you the appropriate fix.

https://www.tradingedgemastery.com

Add this to the “Custom CSS” field in the QuickShare Design settings:

.archive-page .quickshare-container ul li,
.entry-content .quickshare-container ul li {
    background: none;
}

That helped!

Thanks a lot, Nick! ??