It's easy enough to produce hints of incidents that could have been disasters - but failing to provide details does nothing for the posters credibility.
If the OP really has serious concerns about another pilot whose attitude to safety and adherence to regulations is highly suspect, then the obligation is on them to ensure that they make notes and report their concerns to authorities.
If the OP is referring to ATC failure events that could have ended in major disaster, then the ATSB lists numerous of these events, all of which have no doubt led to improvements and recognition of the failures that led to those events.
The fact the reported ATC failures did not lead to any major disaster indicates that the robust back-ups designed to address ATC failures worked as designed - and to offer up alarmist statements that one of these events could have "dwarfed Lockhart River", is on a par with some of the worst gutter journalism that regularly assaults us.