And now with all of those nice new shiny parts what I would do at the dealers is to spray water from their hose to recreate the problem.
If they balk at this then you have your answer...
But from your description your awning was either not set up correctly or not designed for rain.
Just so you know: RVs do not have the warranty and dealer support that cars enjoy. So if your dealer stands behind the product then great! And if not then you will be better prepared for the future.
BTW Water pooling is common - breakage is not.