Microsoft was given an unfair advantage and many key lawsuits were adjudicated to their advantage.
Facebook and many other SM platforms were developed by the government. Competitors were absorbed or canceled.
The government is desperate to keep tabs on everyone everywhere. In the Philippines FB Messanger is free, but people pay for most other internet activities, text, and talk. They have more unanimity than we do now. IE all phones are basically burner phones because sims are dirt cheap, and the phones are loaded with cash. There's NO commercial value because income levels are so low, there's very little disposable income.
In the James Corbett documentary about Gates, he shows an interview with the senior IBM board member who recalls the instruction from their chairman, IIRC, to work with 21 year old Gates. That instruction came from Gates’ heavily connected, banking dynasty mother. In every sense, at every level, the world is raised, run and ruined by families.
CPM was another competing operating system, but likely they owned that too!
Remember bumper stickers with MSDOS Just Say No! ?