I agree Windows is getting worse, but there are still lots stable products in old Microsoft, namely the whole productivity suites like Office, OneDrive, SharePoint, Teams, etc.
All of the new versions of those suck. They're absolutely awful performance and design wise. I don't know what the hell they're doing. It's this horrible mishmash of design decisions and it isn't even good looking. You can forgive a lot of usability issues if it looks fantastic, but it looks like a white screen with some random lines of text and feels like notepad via RDP over a DSL line.
Tell that to the massive increase in relevance and usage that Linkedin has seen, and the huge money maker that is now Github Copilot / Actions / Dev Environments.
The split is categorized by Satya's focus and specifically MS's acquisitions after he took over.
This new Microsoft does very well (Azure, Github, Linkedin, OpenAI investment, Unix focus (WSL, C#/.net on linux)
However the old Microsoft is still around and in some ways just as bad as ever. Namely Windows.