Much of it had to be suppressed because of the nature of the intractable "peace" talks that came later. The communist side stuck with their absurdly theatrical and hard-line propaganda theme, and were using the tiniest fabricated grievance to stall or leverage the supposed negotiations. Western press reports were frequently cited as hostile libelling or evidence of conspiracy against the peace-loving NK (and China, the puppet-master).
There was also a serious problem of lack of resolve in USA and the allies. There had been virtually zero interest in fighting the war in the electorates, and moral and motivation was rock bottom in the deployed armies. There was, unsurprisingly, little sympathy for the SK regime, and western public were not really bought into the global strategic threat of communist expansionism. Communist atrocities didn't really help boost support for the war.