That's just a storage system—a database—but you need other code (like PHP) to put stuff in there and retrieve it again.
Don't want to use Wordpress or other system that you're enslaved to with dashboards and down time. Would rather have control over it. Thanks.
You can have full control over WordPress or any other CMS. You can upload the code to your own web server and do anything to it you want. (You may be thinking of wordpress.com, where you can get a free, hosted blog. But WP is a whole lot more than this. At wordpress.org you can download the WP code and have full control over it. Same with other CMSes.)
The advantage of using a CMS is that all the code is written already, and you can start to add comments, upload pictures, videos etc. without spending a fortune getting custom code written for you.