It wasn't entirely DOS's fault. DOS was a relic from the end of single-process single-user era. Corporate took that and bent it to their use instead of settling for something more complex and harder required an entire department to maintain.

*Claw is more like windows 98. Everyone knows it is broken, nobody really cares. And you are almost certainly going to be cryptolocked (or worse) because of it. It isn't a matter of if, but when.