For various reasons, I regularly use about a dozen, or so, PCs. For home use, I buy off lease Dell units, usually for $150, or less, and then pitch the most obsolete one in the pile. My most used software item is MS Excel. The Open Office Spreadsheet version simply doesn’t compete with Excel. It can’t handle any of the graphing or data processing things I do regularly. Excel ‘97 usually does, though I mostly use more recent versions. None of the alternatives that I’m aware of will support even that. So it’s Windows for me.
LibreOffice, though, is head-and-shoulders above that. Give that a whirl and see what you think.