First, these broken spokes should not be happening. And this sounds like a warranty issue to me. Though if me, I'd essentially rebuild the wheel myself and make sure it's done right. Getting a replacement wheel likely would be built the same way. But not everyone is into re-doing their own wheels.

I'm a 225 lb rider and have about 9,000 miles on my 28 spoke wheels with zero issues. Obviously the more spokes you have the less stress on any one spoke. But my experience is 28 spokes is enough for a rider and load weight of 225 lbs. Not sure it matters but the wheels have carbon rims and bladed spokes. Probably brass nipples, but I didn't build the wheels. They were stock with the bike. A high-end bike, but stock wheels just the same.

I've built a handful of wheels and I'm with Kontact on this one. Build the wheel correctly and it should be fine. Of course, there's always the possibility of some sort of defect but lot's of wheels have been made with low quality parts and last a long time. And 28 spokes is not stupid few. It's on the lower end, but not an extreme.

I too suspect the spokes weren't seated properly and if they are loosening, I suspect they were not tightened enough. And as mentioned, maybe when built the spokes got twisted. This doesn't happen when built correctly. Easy t mark the spokes with a Sharpie to see any twist.

Would better parts make for a better wheel, sure. Are these good enough, if built right, probably.