I added just one plugin and the site speed plummeted to seventy something! Is there a recommended plugin to have better looking tables than the default one?
Any page builder or table building plugin is going to slow down the speed of your site, particularly pages with the custom builds. The page has to load additional code. There’s no way around that. That’s why we use the built in functionality of WordPress whenever it’s at all possible.
The truth is the MAJORITY of problems on your site will be caused by plugins. Be very deliberate about the plugins you keep and the purpose they serve. If you have any plugins that are not ABSOLUTELY ESSENTIAL to the site, take the time to deactivate and delete them. The goal is to have the minimum plugins possible. Most are simply not essential. Multiple plugins on your site it will negatively effect your speed and site performance.