Their developer tools are pretty good for their own platform (but JetBrains actually makes great cross platform tools, some of them are proper free and open source, VSCode is playing catch up). Their C++ stdlib implementation was sucking balls for decades. Their (the dev tools') scriptability was horrible. PowerShell is nice, but it came too late, and it was too server focused.
C# is okay, MS has great teams and people, but they are still very much run by the bean counters.