Done right, WordPress / ClassicPress can be a powerful business or professional CMS. Otherwise, it’s just a blog.
If your website isn’t making your life easier, then it’s probably doing nothing, or making it more complicated.
You need a CMS that lets you quickly and easily make changes and updates. Period.
Inflexible, non-responsive websites are over. Phones are the most-used device for accessing the web, and Google loves responsive sites.