Good for you.

My brother is one (of many) great example of this entitled behavior. I’ve learned the hard way to discuss “terms” early on as a boundary setting strategy. It’s a way to be taken seriously, or at least have them realize you take yourself seriously, and that listening to their professional bloviation, I mean, aspirations and “assistance & support” isn’t a huge privilege and honor for you, to be provided just for the chance to, I dunno, bathe in the glory that is them? You’re supposed to be the main character in your own life, not providing hours of free personal assistance for randos.
People like this get away with their presumptuous behavior quite a bit, and it’s funny but these are often the most outraged people who, when people who’ve gone way beyond what’s reasonable to help them, ask for a tiny bit of help.
You dodged a bullet. You wouldn’t have been able to do anything right. He’s probably already rewritten history to believe that you were just using him to try to make money off him in the first place, not that he was looking to be a soul and time suck for you and got caught.