Running Mint here, for years, on an i7-6700K, 16G of RAM, with absolutely no issues. It runs stable and solid. It's frankly more reliable than Windows ever was, without the constant "improvements". I agree that there are many Linux apps which are only partially functional, due to the developer ceasing work or abandoning them, but they're usually not in the repositories. Apps in general on Linux are more in flux than commercial apps, but there are good basic ones (LibreOffice, GIMP, Mozilla, KiCAD, etc) that are stable and as far as I need, fully functional and reliable.
So, my experience contradicts yours, and makes the point that everyone's Linux experience is going to be a bit different, but it is free of Microsoft's meddling.