Caveat: this is a very complicated subject, and I'm not an expert on mental health, so I can't comment on what would help individual cases. However, based on my experience of working >
1. Remove huge course fees and student loans with punitive interest rates >
3. Stop expecting universities to turn a profit, and stop claiming the students are 'consumers' and nothing else >
5. Stop divisive competition between universities (often based on these rankings) which drains resources away from students and welfare towards advertising, estate expansion etc. >
7. Encourage more diverse formats (by which I mean part-time and distance learning, NOT 2-year fast-track degrees), and encourage courses which benefit students, even if they are small and unprofitable >
I've yet to see @SamGyimah prioritise, or even mention, most of these issues.