In the viral post, the Mom wrote "I need help" and "This problem is too big for me to handle on my own". That's really the key thing here, independent of how her marriage turned out or whether she uses a blog to vent. She's losing control of the situation and is concerned her son will do something stupid in an act of rage. Her post is a plea to the general public to help people with mental illnesses, because sometimes the people in their vicinity aren't able to. Making her look bad detracts from that message, but does not take away from it (IMHO).