I hate how they present is as "problem" they are trying to "solve". I don't have any of these problems and I use Github almost daily. Why someone always has to

I hate how they present is as "problem" they are trying to "solve". I don't have any of these problems and I use Github almost daily. Why someone always has to create artificial problems and re-design and re-invent something which don't need any change? And it is not rare that they make things worse from usability standpoint. A similar example (not layouting though) is also that flat design in iOS. Buttons which have no border and can't be distinguished from labels. Flat, solid colors. If you look at Windows 1.0, it looks nicer than current iOS design, it even has an innovative border around buttons, rounded! So why are designers gong back and making it worse than it had been at the beginning of graphical UI design...