@luckie1367 I don’t believe you need a minimum 30 units to apply. That only applies to TAGs, as far as I know. And you need 30 total from a CC to get priority consideration, but that is through spring.
And re PS, you will not get rejected solely due to a PS. It says so on the UC q+a. A PS can only help. Unless, of course, they suspect plagiarism. Also, not answering the prompt will not cause rejection. I know ppl who did that and got in. And again the UC very clearly says you will never get rejected solely due to a bad PS. The sole purpose of a PS is to help. (BTW, I answered the wrong prompt and got Berkeley and UCLA.)
And having no ECs will only affect you if you’re a competing borderline student - except for Haas. In general, the UCs don’t put that much stock in ECs.
So of your list I would say required coursework missing, leaving out a vital step, lying, and under minimum units, which you didnt mention.