The esthetic wasn't bad, the problem is that it was a massive reduction in functionality. For example, the fact that Metro apps included on windows could only be use in fullscreen mode and only one copy of it could be used at the same time. The new Metro settings they included to replace the ones from the control panel had only like 10% of the functionality of the old one and they actively tried to prevent you from finding the old one. The content density was significantly lower and dialogbox/dropdownmenus couldn't be resized to display more items (eg. list of keyboard layouts that can only display 3 items at the same time)