I haven't really used a WYSIWYG word processor in almost a decade (I like Pandoc), so these are old memories, but I remember feeling like the interface to OpenOffice (before it was split into LibreOffice) was more intuitive than MS Word 2007 and beyond. I feel like they doubled down on 90's-era MS Word-style interface, which I personally have just found to be extremely intuitive and easy to work with.<p>That said, the equation editor for LibreOffice and OpenOffice utterly sucks. This bizarre, quasi-TeX, quais-WYSIWYG interface is extremely unintuitive and hard to work with. The equations themselves generally render fine, but back when I used OpenOffice on Windows I purchased a copy of MathType and would OLE equations in. This didn't work on Linux, which is why I stopped using LibreOffice.