I personally have found SoftMaker's TextMaker to be best word processor, with a backup/fallback being Libre Office. It's got a great UI, good features, and overall is just a good experience. Honestly, the whole office suite is quite good. I definitely like it better than WPS. It's also nice that you can just purchase a one-time license and have support for 3 years, for a fairly reasonable price, tbh. Yearly subscriptions are also available if you prefer that route.
There is a free (as in beer) version, called FreeOffice you can try. It's what convinced me the full version was worth it. My backup is LibreOffice, and while some years ago the difference was stark, LibreOffice has come a long way in terms of support and feature set. So it's definitely come a long way.
I would advise you to consider switching to LibreOffice from Open Office, if nothing else though. Open Office has not received a major update release in close to a decade now, and LibreOffice is truly the successor to it, as it's actually forked from it.