OpenGL was not in any way shit when DirectX started overtaking OpenGL.
It became so around the time GPUs started being programmed by shaders - prior to that era OpenGL was quite pleasant compared to DirectX, yet DirectX mostly overtook OpenGL
I'm not sure I agree with your last point. With the exception of Direct3D, pretty much everything from DirectX has been deprecated at one point or another and replaced with external libraries that usually originate from Xbox development.
DirectInput, for instance. Over-engineered and badly designed, then virtually abandoned (because who ever gets promoted for fixing bugs? You get promoted for features). Definitely not what anyone really wanted from an input API.
It became so around the time GPUs started being programmed by shaders - prior to that era OpenGL was quite pleasant compared to DirectX, yet DirectX mostly overtook OpenGL