Yes hard to really know for sure from the picture.
Something I have done before growing in a super windy location is to surround the plants in fencing. Can help to prevent wind damage and branch snapping.
It might be. We have seen plants get wind-whipped like that when the winds are really strong. It will make branches "dead" damping off kind of like your picture. However, it could be something else like soil/nutrients/water.
I would suggest transplanting into a larger container. That potting mix looks pretty soggy as well, maybe mix in some compost and a little soil to get a better consistency