Imo, so many of Microsoft's dark patterns are a direct result of them owning bing. Bing has bad market share, so MS takes every chance they get to show it to users. Start menu web search, Edge defaults, dark patterns abound just to get eyeballs on bing.
That’s because it is. There’s Consumer Microsoft and Enterprise Microsoft. Enterprise Microsoft products are mostly really great. Anything that’s tied to the consumer side can’t make its returns on fat B2B contracts, so they are forced to extract value otherwise.