You can change your theme and not lose the content. The replacement theme I have found useful is called Twenty Eleven. It is an easy theme to figure out and edit.
Can you elaborate further? What do you mean to recommend you for Social Media Services? Do you need a background or something for Insta, Twitter, FB, or Pinterest?
If you are referring to themes that may be faster to access or more user friendly, there is no prescription as such. Regardless of the theme you may choose for your website, you will post links on social media platforms, via which then visitors can access your site.
Actually, I believe that a rant includes some redundancy of comment and more than 3 sentences. Perhaps it is a mere expression of frustration? Since the date is over 5 years old, he probably wasn't aware that someone called it a rant.