I'd say it wasn't the carbon fiber that could have been a problem, but the resin (epoxy) used to bond it. They would have to mix a shit load of resin for bonding. It's really easy to get air bubbles in it during the mixing process. To a degree these can be removed by deaeration using a vacuum chamber. But you still have to be careful not to get bubbles when the resin is poured into the mold. It would be next to impossible to ensure that there were no air bubbles in it.
Every bubble represents a weak point in the carbon fiber. I don't think they did rigorous testing and inspection to ensure that there were no bubbles present.
Another issue could well be the carbon fiber body and the titanium end caps moved at different rates as the pressure increased. Again, just a small difference that allowed for the smallest of leaks and you're finished.
No it was trump's fault.
