After that, old copies of MSOffice.
Next-best would be a hodgepodge of the lighter options on Linux and such. Gnumeric, Abiword, that sort of thing. Not great, but at least they're light on resources and easy to use.
Distantly after that, LibreOffice.
Then, modern MSOffice in last place.
The only reason I'd count any of them as "worse" than modern MSOffice is that ~perfect office compatibility and a bulletproof excuse when things go wrong ("I'm also using MSOffice, don't know why your document isn't working") is non-negotiable in any business context.
[EDIT] Oh I forgot about Google. That's actually the true last-place. Modern MSOffice isn't worse than that. Christ the performance is awful.