Read what some others think of one ranking system. Wall Street Journal/Times Higher Education College Rankings: Readers React - WSJ
a consequence of ranking in the UK UK students protest planned university reforms - News from Al Jazeera
University Rankings in Perspective https://www.insidehighered.com/blogs/world-view/university-rankings-perspective
That the global rankings all focus on research makes them not so useful for students who are interested in schools that would actually be good at teaching them things.