I was looking at automotive/RV battery tests on Consumer Reports just yesterday. Also read a number of threads on the Ford Truck Enthusiasts Forum. Once you figure out whether or not you have a decent converter/charger in your rig, here's what I learned from my research:
The quality of the AGM batteries (such as Optima) has declined over the last few years. Evidently, they caught on (I even put one in a small trawler I had about 8 years ago - and another in a Tahoe) and the industry has had trouble keeping up with the volume. Thus, a decrease in quality of the manufactured product with a lot of premature failures.
In the wet (lead/acid) cell batteries, Interstate comes out on top in terms of longevity and reliability - including sustained CCA and reserve capacity. Funny this is just what my late father said ever since he owned a Texaco service station in the '60s.
As stated, it is critical that you figure out your inverter/charger before replacing the battery. It sounds like your battery got "cooked" and that's not a battery problem.
Rob