This reads like a case of 'all about me'-ism. It sounds like this person negotiated their salary, and then decided the company didn't value them _because_ the company agreed to raise it when asked. If your goal is to have people throw money at you which you don't ask for, you are going to have a tough time working. A company that's willing to double your salary when you point out the offer is low sounds pretty great…
I'm not sure if the parent comment realizes that the author didn't actually accept the job? It sounds like parent believes she cut off work or something, which isn't at all what the article describes; it describes a pretty standard run-of-the-mill negotiation process that the author eventually cut off, and that left the author with a sour taste in her mouth about the company culture.
None of that is entitlement. If you go into contract work, you are going to get a million sob stories from a million companies about how building products is hard. Often those sob stories will be paired with real red flags like this article describes (leading with aggressively low offers, asking you to put off other work you're doing, etc). Building products is hard, but also paying rent is hard, and so you have a duty to yourself to advocate first and foremost for yourself during negotiations.
It's not kindness for you as a contractor to take on work that doesn't fit you or that you don't think is sustainable; you're setting yourself up for burnout and failed projects if you do that. And burning out in the middle of development, not being able to make rent, having to ignore other clients, all of that also makes products hard to ship. All of that is also a recipe for going out of business.