Well, the way I look at it is how we all gravitate towards different razor blades.
The blades themselves are not flawed - they are sharp and the design is essentially pretty straightforward - but there are still some that favours some brands over others..and straight out dislike some and feel that they get bad shaves with them.
Me, I rather dislike Voskhods but really like GSBs and Wilkinsons DE blade...while for others it might be completely the opposite.
I assume part is technique (not bad vs good necessarily but how you like/prefer to shave), skin type and 'other' such as how your lather was, how hard/aggressive/fast you yourself shave (and prefer to shave), etc, etc, etc....
I think as long as there has been more than one product of anything on the market w/in the same area there has been people that favor one over the other. I guess the YMMV term was created for a reason