Can you provide some details on the reasons for needing MS Offfice? I'm genuinely curious. What does LibreOffice do differently that makes it a problem for you to use? Personally my only complaint is the performance of LO, which could be better.
For me, some complex Excel usage was not replicable in either Sheets or LibreOffice.
I'm not GP but I do know it's rare to open an existing .docx in LibreOffice and have it look right; who knows what it looks like in Word after I've edited and saved it. It's fine creating new documents, and Excel/Calc is better than Word (inherent in being more structured I suppose), but it's not a drop-in replacement. I've used web Office365 when necessary though, not Windows.