To help you more specifically. If you could give us your final uw gpa. Ap classes if any and grade. Plus ap exams. Also how many aps are offered at your school. Class rank or percentage. Top 30 etc.
your 35 would indicate your core capabilities but perhaps your teachers thought you coasted a bit or were not that engaged, it might have subtly been mentioned in your recs or gc statement. That can hurt if you are on the edge for a selection committee.
My first thought was 391 uc gpa isn’t as strong as your test score and that would impact the UCs
And if the grade 9 was an off year grade wise that could explain things for the non uc schools as well. Lastly what did your fall grades look like.
I see some reasons. And it’s primarily the schools you selected are incredibly selective and 8 out 10 are denied admission. It’s even less when you back out the spots for athletes and other preference categories. 1 out 10.
And a 3.5 uw or less with a 35 is a great candidate at many schools. It’s 1 in a 100 and the 1 is only that really special application at many of the schools you applied to unfortunately.
applying to many of the same type of schools doesn’t improve your odds at all. They are the same each time.
I would venture to guess that one of your waitlist schools will come through in the end.