In a word - yes. Each campus evaluates based on 14 criteria - some of which are qualitative so there is a lot of subjectivity in UC admissions.
But, as a student, get your head around the concept that all of the UCs are very good schools and have a LOT more qualified applicant than they have seats.
UCR’s average freshman admit had close to a 4.0 UCGPA last year. There’s no shame in getting in or attending there.
https://admission.universityofcalifornia.edu/campuses-majors/riverside/freshman-admission-profile.html