Pothole totals rPod

I hit a pothole with my rPod 195 which bent the frame enough to be non repairable. The first symptom is that the door frame is bent enough that it is hard to close the door. The scary thing is that I was going less than 20 mph when I hit it.

Are all TTs this fragile? This is a 22 foot single axle trailer. It seems to me that is too much weight for a single  axle, but that seems to be the way most brands are going.

My first trailer was a 20 foot dual axle, which seems like a better design to me.