Not really. Based on the UCB feedback, you have some gaps.
Believe me - it's way worse to get accepted if you're not ready. You start on a path, a very expensive path, where you get smoked interviews, barely keep up with classes, and don't really get the value of the experience. This isn't stuff you can cram for - there's too much material and not enough time.
I took an extra year to prepare after getting rejected by my top choice (and some life stuff came up, too). I wouldn't trade that for anything, even though I'm mid-career and gave up a lot to do that.
You want to be the one coming into August (or March - sup UCB?) crushing hackerrank challenges, laughing about how easy probability and sto-cal are, and overloading on extra deep learning classes because you can finish the homework challenges. In the top programs, there are a lot of students in this category. I'm definitely not, but man I would be in deep trouble had I not built even the shaky foundation I have.