I don't doubt there are problems with nursing jobs. Look at any jobs board. You'll see people telling everybody to get out of every profession (lawyers, teachers, etc.) I mean ... a lot of jobs do suck.
BUT, unlike other professions, the demand for nursing is high and will continue to grow. Which means you have lots of options if one job doesn't work out.
I see a couple of problems with that nurse's post. For one thing, check the rules of your state BON. In California, for example, you cannot be charged with patient abandonment if you refuse to work OT.
And, in California we have a ratio law which, by most accounts, has made work loads more manageable by reducing the number of patients per nurse. This person probably worked in a non-union/non-ratio state.
Pay may be lousy in other places, but USA Today recently reported that new grads here are making up to $60,000 a year. And the California Nurses Association (the union in this state) has been negotiating 20 percent or more pay raises in their contracts. So at least some nurses are getting pretty good pay raises here.
Consequently, I either plan to work for a union facility, where you can't be forced to work OT or holidays. Or work for one of the hospital chains that glady complied with the ratio law early, and has actually gotten the number of patients down to four per nurse, well below what the law requires. Hopefully, it's a sign this particular employer is friendly towards nurses.
And, if worse comes to worse, I'll get out of bedside nursing all together. Complaining nurses never point out that at least a third of nursing jobs don't involve the bedside at all. I know happily employed nurses who work for drug companies, blood banks, regulatory agencies, insurance carriers, law firms, nursing schools, theme parks, etc.
There are always options. You just have to do some homework on employers and employment options, and be willing to make changes to avoid trouble.