It could indeed be that your stats are not right due to RSS. And you could also look at your stats differently: is the % so low because there is no interest, or is it because your site was best experienced on a desktop? I don't think the latter is the case, but cause and effect can go both ways in this case.
Also take into account your users. A tech blog is not something many urgently require on-the-go. It's typically something you read at leasure, when time allows, often on bigger screens.
Still, as your site is heavy on text, a few quick fixes is all it takes to make it suitable and pleasurable for various devices. And you learned a great new skill. Win win.
Essentially what you did is graceful degradation. You started out at desktop, and provided optimized layouts (fixes) for smaller screens and less capable devices. According to many in the web industry, this model is about to be turned upside down into mobile-first. Mobile will be the most important channel. You start out with a mobile design, and then enrich it for larger screens.