If you are capacity testing a battery, different BMSs could cut off prior to the 100% rated capacity, but not at 43% of it.
I would say its bad, provided
1) Batteries were fully charged to 3.65 volts per cell in a top balance (or manufacturer spec)
-and-
2) Discharge cutoff was 2.5 volts per cell.
Please note I have only capacity tested individual cells.
For example, I doubt the BMS is set to a cutoff of 3.65 per cell so probably 3.55 or so, which is 90%+. On the other side, I doubt a BMS was set to a cutoff of 2.5 volts per cell, probably around 2.65 volts, so around 10%. I would expect at least 80%, 80 amp hours, of capcity prior to BMS shut off, but probably more than that. Also, with the BMS there are battery voltage cutoffs in addition to cell cutoffs, but still at least 70%, probably more.
EDIT: I would also add you could check the discharge time with a known load. Should not be as accurate but will double check the reliability of the discharge unit. I have a couple of LEDs and other items that draw 12 volt DC current that I could hook up and test with an amp meter to see how many amps being drown. for example a 5 amp load would last around 9 hours based off the discharge test. If it last well longer than that, the discharge tester is bad.