Changing the theme on your website will not give you better rankings. Adding widgets to your sidebars will also not offer you more traffic. Checking your statistics on Google Analytics and/or Google Search Console frequently is also another major distraction and when you do not see the results you want, it can very often make you angry and unproductive.
The days when internet browsing was done exclusively on desktop PCs are long gone. Today, more people than ever before are using mobile devices to access the web, and if you force your visitors to pinch and scroll their way around your site, you’re basically telling them to go elsewhere. Ensure that your website is accessible and comfortably viewable across a range of devices, including smaller smartphones.