Yes, I have to concur with this. I think of myself has relatively experienced, but it takes me generally a day to get new boilerplate working. This includes time to read documentation and get things set up and to get a start in understanding how things differ from what I usually use.
The amount of software you've produced and published using a variety of stacks -- Objective C, Cocoa, Swift, JS, Node, Clojure -- and APIs is really impressive. Most people haven't even tinkered with that many things, nevermind publish stuff out for the public to use. That last part is an extremely high hurdle, especially since it requires UI/UX skills and user empathy.
Hell, even your portfolio website is far-above par for any software engineer. Not just in content, but the well-considered layout and visual design.
I don't want to downplay your situation, you indeed have an uphill climb. But you do have skills and actual experience that put you in higher probability at success with software publishing, compared to most software engineers who were to find themselves forced to find employment without the ability to network or get recommendations. Hopefully you can find success again in iOS publishing. I think many if not most iOS developers would be envious of the variety in just your iOS portfolio.