If Microsoft hadn't tried to actively kill all its competition then there's a good chance that we'd have a much better internet. Microsoft is bigger than just an operating system, they're a whole corporation.

Instead they actively tried to murder open standards [1] that they viewed as competitive and normalized the antitrust nightmare that we have now.

I think by nearly any measure, Microsoft is not a net good. They didn't invent the operating system, there were lots of operating systems that came out in the 80's and 90's, many of which were better than Windows, that didn't have the horrible anticompetitive baggage attached to them.

[1] https://en.wikipedia.org/wiki/Embrace,_extend,_and_extinguis...