Upfront theme slowing my site WAY down

I'm using the upfront fixer theme adjusted on my site bridgetthart.com (a sub-site of hartconnections.com)

The page is loading SUPER slow and the majority of the error codes I can find under https://tools.pingdom.com or https://developers.google.com/speed/pagespeed/insights are looking like upfront is the main culprit for the slow times.

I've tried several things and it has improved some, but i've run into a wall about what else I should do so I'm reaching out to you here and also to my hosting service to try to resolve.