That is not correct at all.

Part of the revisionist history these days is making IBM out the be hero that was crushed by Microsoft but nothing could be further from the truth. IBM was the lumbering giant that evaluated developers by lines of code produced, had 14 levels of management, and wanted to protect their hardware interests more than anything. Microsoft hated working with them because they sucked. OS/2 was so buggy that the first patch was almost as big as the entire original install.