This is not a bug. The quality and functionality of Microsoft's products have nothing to do with the quality or functionality of Ubuntu. The notion that market share is a bug is cute, but please explain to me how a feature of another product (a statement beginning "Microsoft has...") is a bug in Ubuntu. Bugs in Ubuntu start with statements like, "Unity crashes when...", "Ubuntu boots slowly because...", "Banshee uses too much memory."
If the subject of the bug isn't about Ubuntu, this is not an Ubuntu bug. Maybe this could be restated as, "Ubuntu's market share is too small."