I found LibreOffice sluggish and lacking many useful features only available in Office 365.
When I recently saw an ad from a reputable news publisher/media site for Office 365 with a lifetime subscription (installed on your PC) for a one time discounted price of $50, I jumped on it. No more sluggishness, no more clumsy features like formatting of numbers etc. that I experienced with LibreOffice. I also can ditch eM Client as my mail reader. I can now use Outlook.
While LibreOffice certainly has it’s advantages, I found for me the workaround was to use MS Office via OneDrive the workaround. No heavy software, no sluggishness etc.