I used to work for IBM. The reason I think OS/2(half an operating system-old joke) failed was IBM, in their infinite wisdom, made the OS/2 application development suite super expensive to buy. There was about a 3 year window in the late 90’s where they had MS whipped in the market place and blew it totally. The should have made the dev suit totally free ware.
Left in the great purge...1992.
Me and some friends, back in the late 80’s, used to use a Hex editor on copies of PC-DOS disks COMMAND.COM and change the copyright from “International Business Machines” to “Ignorant Business Men”.
True Story.