Yeah the Wikipedia is instructive.
>In the last part of the inquest held after the sinking, a group of master shipwrights and senior naval officers were asked for their opinions about why the ship sank. Their discussion and conclusions show very clearly that they knew what had happened, and their verdict was summed up very clearly by one of the captains, who said that the ship did not have enough "belly" to carry the heavy upperworks.[81] When other ships that predated stability calculations were found to lack stability, remedial action could be taken to increase the beam.
Also the original builder and his successor both died before completion. (Not suspiciously, but makes responsibility in construction harder)