Actually, many CSUs have gotten less competitive over the last decades. Only 7 out of 23 are now listed as having campus impaction (though some majors like nursing are commonly impacted). A CSU applicant to a non-impacted major at a non-impacted campus should be admitted by meeting baseline CSU admission requirements.
Of course, the 7 campus-impacted CSUs include the usual suspects like CPSLO, CPP, SDSU, and SJSU.
Indeed, there was a study in NC suggesting that grade inflation was greater in high SES schools than in low SES schools.