>>13351274He lead the end of software sharing with his 'Letter to Hobbyists'.
He started a campaign of fear, uncertainty, and doubt to destroy free and open software. This was caught in leaked documents. (Halloween Documents)
He purposelessly violated or abused standardization to prevent interoperability with competitors at the expense of consumers.
He set up a system where computers could not be sold with Windows unless they were *all* sold with Windows.
His company was so grossly anti-competitive that it was almost (and should have been) broken up.