Much more reasonable post, thanks for that.
These kinds of issues simply are not FR's fault.
Buyers demand cheaper and cheaper rigs, so the manufacturers have to find ways to cut corners. That forces them to go to the cheapest suppliers of things like landing gear, axles, and frames. It is hard to tell a good landing gear jack, or axle, from a bad one. The frames are obvious, as most are paper thin and scare the heck out of me. I am afraid to attach a hitch on the back of my fifth, even though I would only be towing a very light motorcycle trailer. With my old camper, I didn't think twice, as the frame was twice as thick.
Back to the axles, there seems to be a few people that have gotten axles that were poorly assembled. I would think that they should be welded up in a jig, so I wonder how on earth they could screw that up?
I understand your frustration, but unless buyers are willing to pay, the manufacturers will only supply what they can.
We have a small local manufacturer that still makes a high-quality product, but they aren't cheap. And I imagine they are very heavy, reflecting the better construction. I would have bought one, but my driver's licence restricts me to 10,000 GVWR maximum. I wanted a 28-ft fifth, so had to buy an ultralight.
Since you mostly like your unit, I think buying a heavier set of axles is the way to go. It should be a relatively easy swap.
You could also swap out the jacks, as I know they are made in Canada and most likely the US, so a good set should be available.