University rankings have two key issues: 1. They are significantly biased to English language (universities/research output) and bigger countries in general 2.

University rankings have two key issues: 1. They are significantly biased to English language (universities/research output) and bigger countries in general 2. They are totally irrelevant from the student perspective as they mostly focus on research output, which means that you'll get the richest universities and the best professors will be writing papers rather than teaching bachelor level courses. There are some attempts to fix these issues (see eg the EU "Multirank" which allows you to choose your priorities), but it's still hit and miss.