It’s not broken because it works fine on the demo site http://demo.tagdiv.com/newspaper/120-er-visits-linked-synthetic-wordpress-nyc-past-week/
i went in the showcase topic and random choose some one website and it work for them as well..
disable the social plugin you and clear cache and see if it work..because i done test on demo site and someone site and it working as entended…
Here is images of my site in some test too show you some of those tips i give you work well because i’m using them all and plus more that i not give you…
Pingdom Test 
GTmetrix Test 
I’m going help you a lil but you have to learn to do these things ur self…
First you need to Defer parsing of JavaScript there is a plugin that can do that for you called>>> “Async Javascript” in the settings you will choose the defer opition you can find the plugin here >> https://wordpress.org/plugins/async-javascript/ i’m using it as well and it do a great job with out issues…
To Optimize ur images this plugin can do it for you..EWWW Image Optimizer find it here >>>https://wordpress.org/plugins/ewww-image-optimizer/
You need to enable GZIP Compression on your sever
That cache plugin “Super Cache” is rubbish..i recommend you use ZenCache you can find it here>> https://wordpress.org/plugins/zencache/ it will cache ur site better and make it faster…
To help you with other issues like “Leverage browser caching” put this code in the bottom of ur .htaccess file
# END WordPress
AddType text/javascript .js
AddType application/vnd.ms-fontobject .eot
AddType application/x-font-ttf .ttf
AddType application/x-font-opentype .otf
AddType application/x-font-woff .woff
# BEGIN Expire headers
<IfModule mod_expires.c>
ExpiresActive On
ExpiresDefault "access plus 5 seconds"
ExpiresByType image/x-icon "access plus 2500000 seconds"
ExpiresByType image/jpeg "access plus 2500000 seconds"
ExpiresByType image/png "access plus 2500000 seconds"
ExpiresByType image/gif "access plus 2500000 seconds"
ExpiresByType application/x-shockwave-flash "access plus 2500000 seconds"
ExpiresByType text/css "access plus 700000 seconds"
ExpiresByType text/javascript "access plus 700000 seconds"
ExpiresByType application/javascript "access plus 700000 seconds"
ExpiresByType application/x-javascript "access plus 700000 seconds"
ExpiresByType text/html "access plus 600 seconds"
ExpiresByType application/xhtml+xml "access plus 600 seconds"
ExpiresByType font/truetype "access plus 2500000 seconds"
ExpiresByType font/opentype "access plus 2500000 seconds"
ExpiresByType application/x-font-woff "access plus 2500000 seconds"
ExpiresByType image/svg+xml "access plus 2500000 seconds"
ExpiresByType application/vnd.ms-fontobject "access plus 2500000 seconds"
</IfModule>
# END Expire headers
I use a code in my functions.php file to help me sharpen my images..may be it can work for you, but you will have to Regenerate your old Thumbnails images to see the effect but all new uploads after will take effect right away..
function modify_image_before_saving( $image, $post_id ){
if ( ‘attachment’ == get_post_type( $postid ) )
return $image;//add interlace image option
imageinterlace( $image, true );// sharpen image
imageconvolution( $image, array(-1,-1,-1,-1,16,-1,-1,-1,-1) , 8, 0 );return $image;
}
add_filter( ‘image_save_pre’,’modify_image_before_saving’, 15, 2 );
That super cache plugin is rubbish it don’t cache ur site good,I don’t know why the support team will recommend that plugin to they clients,when that plugin first came out it was good since all the updates the plugin gone down hill…
The best plugin for doing a great cache job on your site and works great with the theme is “ZenCache” this plugin make ur site very fast and works as entended… get it via WP https://wordpress.org/plugins/zencache/
The plugin so popular that it have these much installs.. Active Installs: 50,000+
OVERVIEW
If you care about the speed of your site, ZenCache is one of those plugins that you absolutely MUST have installed 🙂 ZenCache takes a real-time snapshot (building a cache) of every Page, Post, Category, Link, etc. These snapshots are then stored (cached) intuitively, so they can be referenced later, in order to save all of that processing time that has been dragging your site down and costing you money.
The ZenCache plugin uses configuration options that you select from the options panel. See: ZenCache -› Options in your Dashboard. Once a file has been cached, ZenCache uses advanced techniques that allow it to recognize when it should and should not serve a cached version of the file. By default, ZenCache does not serve cached pages to users who are logged in, or to users who have left comments recently. ZenCache also excludes administrative pages, login pages, POST/PUT/DELETE/GET(w/ query string) requests and/or CLI processes.
Features
SIMPLE and well-documented configuration (just enable and you’re all set!).
Options to control the automatic cache clearing behavior for Home and Posts Page, Author Page, Category, Tag, and Custom Term Archives, Custom Post Type Archives, RSS/RDF/ATOM Feeds, and XML Sitemaps.
URI exclusion patterns (now supporting wildcards too).
User-Agent exclusion patterns (now supporting wildcards too).
HTTP referrer exclusion patterns (now supporting wildcards too).
The ability to set an automatic expiration time for cache files.
Client-Side Caching (to allow double-caching in the client-side browser).
Caching for 404 requests to reduce the impact of those requests on the server.
RSS, RDF, and Atom Feed caching.
The ability to cache or ignore URLs that contain query strings (GET Requests).
An Advanced Cache Plugin system for theme and plugin developers.
