Seeing Microsoft die would give me great schadenfreude, but all big companies do some good things and some bad things, so it's worth focusing on their specific sins. I see two of them: their desktop monopoly and their Office monopoly.
Their desktop monopoly isn't what it once was, especially considering that most people get online today using mobile devices. But it never really went away. Windows is the only commercially successful desktop operating system. Everything else is a niche product without access to the enormous ecosystem of Windows-only desktop software. Desktop Linux exists, but it isn't any kind of commercial success. The Mac desktop exists to sell Apple hardware, it isn't a product on its own. And part of the reason it exists at all is that Microsoft publishes a version of their office suite for Macs.
MS Office is absolutely entrenched in corporate computing. Many of us here on HN can get by on non MS Office products, but if you're exchanging Office documents with customers you absolutely need to use MS Office to get a decent level of compatibility. For a huge number of businesses, there simply isn't any choice.
Microsoft isn't about to go out of business and a lot of people enjoy using their software and feel productive. People should have a choice. Microsoft could go a long way to repent for their sins if they open up both Windows and Office to the point where there are significant viable alternatives to both. Microsoft should be able to compete on quality, not on possessing the keys to their proprietary kingdom.
I'm not holding my breath.