The problem with Word is that uses styles whether you want them or not, or even know about their existence. And the default is a nest of dependent styles. Untangling a document is thus a task that involves some of the bigger swears. Start with a blank canvas, ffs. The problem with Word is that it's massively overcomplex for 99% of users, and for the 1% who need the complexity, the implementation is often bizarre and ill-conceived. And for things that just ought to work, like placing graphics and easy WYSIWYG layout, they still don't seem to work in any meaningful manner. If anything, the main aim of the designers seems to be to introduce multiple methods of engendering frustration in any and all categories of users. In which case, they've been successful beyond imagination.
Part of the problem is, of course, the need to keep adding new features – let's face it, word processors had everything they needed two decades ago.