The $150K is not something that’s typical, if the CMU starting salary of $110K median is to be believed, most are not getting $150K, and many times people will report the base salary, bonus percentage, sign on bonus if any, and stock, which some entry-level kids get, but many don’t. These companies have budget and it’s not $1.5M for ten new hire grads. Think more $300K for 3 and the hiring managers and HR figure out how to divide based on interview performance, location and experience (say internships).
Anyway OP, I thing your really negative vibes you’re getting around CMU, words like ugly campus, stressed out students, go with Lehigh.