Not all ST tires made in china are china bombs. Most brands in load C/D/E are though. Those are the ones that work better on a lawn service trailers that gets pulled around town...or utility trailers that sit most of the time....boat trailers that make local short runs to the local fishin spot...neither see very little if any long all day runs on the highway carrying a load like many rv trailers operate.
I pull a lot of miles per year on my rv trailers (8k-10K) with 5.2k-6k axles. I use LT tires so just like my trucks I don't have any tire issues at any speeds.
On my flatdeck trailers with 3500-4000 lb axles I use P tires and like the P tires on the wifes 1500 chevy they also have no issues.
OP didn't mention what size/load range is on his new trailer so not much in the way of a good tire recommendations.
But the OP is right about ST tires just letting go. BTDT years ago even when all ST tires were made in the USA.
Road hazards ?? Tires on our tow vehicle run over the same potholes/obstacles as the tires on the trailer. Doesn't take much to see what tire types make it and which ones don't.