I'm sure everyone's heard this before but ALL composite bats only have so many "hits" in them. The carbon fibers and epoxy resin only last so long. Remember the old Easton Stealths and Synergys? The more they were used, the hotter they got because these carbon fibers loosened up and were able to flex more until finally...crack. The difference is those old bats were built like tanks with a thick outer shell. The new ones, not so much. Everyone is looking for the "next best thing out there," or the "hottest bat," they can find. Do they want to have to put 750-1000 swings on it to break it in for DD? Nope. They want it hot right out of the wrapper. In order to get the maximum performance brand new from the wrapper, the outer shell is now much thinner. Thus, the new bats break much more easily than the ones in the past.
Another reason the new bats break more often is the fact that most composite barrels are made in China and then shipped overseas. Let's be honest, their quality control isn't the best. Plus there's inherent defects due to the process itself and the materials used. The problem is that many defects are not caught during the inspection process because they can't be seen.
Although I don't know which manufacturer has the most defects/breakage per model, I can tell you that I would agree that I hear of the Ghost breaking more than any other bat. Of course, that may be because there are more of those in use than any other current model...at least going by my teams' choices. Out of 13 players, there are a Xeno, 2 LXTs, 2 Prisms, a PXT, a Rocketech, and 6 Ghosts or Ghost Advances.
As for breakage by drop weight, I have seen and heard more drop 11's failing than any other bat weight no matter the manufacturer. The swing speed is just too great for these lighter bats and overstresses the composite material. This is also why the heavier bats don't fail nearly as often. DD swings a 34 drop 8 Ghost. She was still swinging the 2018 model until mid August when I bought her a 2021 Ghost Advance. This 2018 has gone through 3 years of college practices, Fall games and 2 college seasons plus hitting between 600-750 balls per week when she was home from college. The 2018 is now in the hands of one of my hitters and still going strong.