To many of the readers here, we are all looking for ways to signal to Big Tech to back off of our rights and stay out of our private affairs. However it is time we stop paying these tech firms our hard earned money. In particular, we need to stop paying for subscription software. And there are some easy targets we can replace.
One such easy target: Office 365. Whether for home or the office; we all use documents and spreadsheets. One of the better competitors is LibreOffice: https://www.libreoffice.org/. LibreOffice can open several Microsoft formats (i.e. .doc and .docx). It is free, open-source, and utilized by a few European governments (so it is not going away anytime soon). The installers can be used by Windows, Mac, and Linux.
While you are at it, save your documents using Apache OpenOffice formats (i.e. .odt). That way you can open your file with almost any editor (even Office 365 itself). No more lock-in to Microsoft. Hope this helps you get yours against Big Tech.