Should I go to a low-ranked school where I can shine, or an elite school?

At UCSD, many transfer students live in triple rooms, if they want to live on campus, not sure if that is positive or negative, but UCSD offers two years of guaranteed housing to entering freshman and apparently on campus housing for transfer students like OP. 85% of UCSD freshman live in triple rooms, and 45% of transfer students live in triple rooms at UCSD.
https://hdh.ucsd.edu/housing/incoming/pages/