It is not true that grades don’t matter- in fact they matter very much. Cal Poly SLO is very, very competitive and especially so for Architecture. Your GPA is too low- any of these schools will be a huge reach for you. The upper and mid-tier UC’s will also be reaches although you might be OK for Merced or Riverside. The UC’s do like well-rounded applicants, but your test scores and GPA are the first thing they will look at. If you are accepted at any of these schools, you will most likely not qualify for any merit scholarships.
Try using the “Find a College” tab at the top of this page. You can enter your GPA, test scores, desired major, geographical area, size of school, etc, and it will generate a list that will better meet your qualifications. There are other sites that will do the same thing. While it is not the final word in schools for you, it will at least give you an idea of schools that might be appropriate for your stats.