It looks well marked to me.
Here is the problem in my view.
In the old days when you went on a trip in your car you read a map, you wrote down directions and you followed them.
Today you get in your car, you program your GPS and you go.
Too many boaters think boats are like cars. They are not.
There are no roads and the boat won't tell you or warn you about anything.
Before I leave in boat I review the charts. Yes I review online but I do own a book of paper charts somewhere.
But I look. I study. For areas I am not sure about I get local advice. I write down any part I am not sure about on paper so admiral can read too me.
I rely on my eyes, my iPad charts and my Raymarine plotter. If I have a discrepancy between one of them I stop.
Clearly this guy either didn't know the area and didn't study his charts and didn't look at his plotter.
He used his eyes, he saw open water and he went.
Now he may of had a mechanical issue and if he did then we are all wrong. But for a twin engine boat to end up on submerged jetty he would have to have major failure.
Just my .02.