It is only my opinion. But I would not blame your Governor Newsom. Instead, I would place the blame squarely upon the shoulders of President Biden:
Biden has been in office now for several weeks. He was elected months prior to that and knew from the start about the virus.
Biden found it straightforward to criticize President Trump’s great and amazing efforts to fight the virus. Words are easy. But lately it has been necessary for Biden himself actually to perform. He no longer can lean on Trump’s successes while mouthing empty words of scorn.
And Biden is not performing. While Trump built tall buildings, mastered great projects, and generally “got stuff done”, Biden is merely a politician and nothing more. And the people he has appointed to his team are all eggheads and worthless academics, not doers and achievers.
So don’t blame Governor Newsom. He is not receiving from Biden the sort of help he really needs.