Either it was a really lousy hull with woefully inadequate buoyancy at the bow or it was overloaded at the bow. Having said that there are plenty of videos on YouTube of boats entering/leaving that inlet and it looks a bit naughtyThe boat looks pretty low in the water on the approach,the bow is barely above the water even before it gets pushed into the wave that finishes it off, but still its surprising how quickly it goes over.
An even better knack would have been to stay in the marina, I reckon.Guessing the knack is staying on the crest
Looks to me like a lake boat with little free board being used in a following sea with insufficient power being deployed to get ahead of the wave. Low power boats designed for use in following seas have canoe sterns with high free board. This looks like wrong boat in wrong location with wrong power.