Pretty much everything you named is simply first-to-the-market horror-show from design perspective.

Javascript? Check.

Android? Check.

Windows? Again, capturing market via transitioning from DOS.

They did focus on many important things like having exceptional backwards compatibility (transitioning from DOS, etc), and kernel team does a decent job usually, but none of this is necessarily attributable to Gates and it's simply what you have to do to capture a market/platform.

I don't know if this is genuine sentiment you're expressing or just naivety, but people that can glaze this hard this easily usually go very far in life. I'll give you that, I wish I could do this.