NTA. Hate to say it, but he is among many people in that age group who thinks they can get what they want when they want it. Getting a "solid income" requires work. Getting an even reasonable career requires work. He needs to start. Any of those jobs require some level of education unless he hits it big in a slot machine, wins the lottery, inherits a fortune, or becomes instafamous... All of which still requires some level of work to get to.

It sounds like you've built a level of resentment. Be transparent. Set up a timeline. Then make your decisions as you see fit for you. He clearly isn't thinking about anyone but himself. So, you should do yourself a favor and think about you.