I wouldn’t major in math so much as something that builds quantitative skill but perhaps has a fair amount content rigor AND grade inflation. I am willing to bet you that QSS and econ. have lots of both because they take into account what is needed to land certain jobs where STEM assumes that you are pre-grad, going into industry, or pre-med (where weeding out a few along the way can only help the “success” rate of the institution) where 2 of the 3 value experience and skillsets more so than what can often be a superficially high GPA (one you got from a very easy major or avoiding rigorous instruction). There are some jobs that are quantitative that apparently test for the skills…(which means you need to actually be good, if your GPA resulted from a watered down curriculum as opposed to tough content but grade inflation, then you will be exposed)