Have to say that I have heard all this about rod breakages in top end rods 25 years ago. Nothing much changes.
When I was working in retail it involved top end fly rods costing many £100s, Loomis, Sage, Hardy, Scott and more, never the anglers fault. But knowing some of the anglers and watching them fish, first hand, it didn't take a genius to work out why the rods broke.
I'm not saying there are no manufacturing faults, nor some design faults, because there are. But if a rod is going to break under stress it will do so fairly soon, not wait a year after purchase.
Different action and angles give different stresses, as has been said above, a 5oz roach bouncing with the rod at a bad angle is way different from swinging in a static fish correctly.
For the record I have abused my acolyte no end swinging fish in. Thinking to myself afterwards " Don't be an idiot, net it". At some point I will break it, but not blame the rod.