Hi Snakedoctor. I've been quite fascinated by this thread. I have a small piece of feedback for you, as someone who's interviewed about 200-300 engineers over my career I've talked to a lot of people and feel like I have at least something of value to add.
I hope you're not offering these sorts of hyperbolic "proofs" of your competency to your interviewers, like you've done here. I've seen a few comments from you like this. Anyone who feels the need to go that far out of their way to prove how smart they are... probably aren't as smart as they think they are. It also does come off as narcissistic.
I get that you have accomplished some cool things in your career so far, but you have to let people evaluate those accomplishments for themselves. They may be very impressive to you, but might not make the slightest difference in the context of the role you're applying for. If people ask about them, be ready to tell. If they don't ask, don't go out of your way to point them out, they're not pertinent to the role. They're on your CV, that's enough.
You do a lot of pointing these accomplishments out (I worked for IBM / I contribute to GNU / I went to college / I got this and that job), but... here you are. Unemployed. Which only leaves two possible explanations; You're either not being forthcoming about your accomplishments (exaggerating them or simply lying), or there's something else, something very negative that means that despite your achievements, you still can't hold a job.
So, you have to be brutally honest with yourself and ask yourself; What is that thing? Only you can answer that question.
Finally, I want to give you a reality check on those accomplishments. They might not be as large as you think. Big, noteworthy accomplishments take years to complete. Completing a masters degree, getting a PhD, working up to a senior position in a company, learning a language, raising a child, building a house. It sounds like most of your achievements did not require the investment of time, but rather are trophies to commemorate your greatness. Companies want people who persevere, and get stuff done, and stick with it. The type of accomplishments you've mentioned show none of that, and your career progression shows the complete opposite.
I hope you make something constructive out of my comments, and use them to improve your approach to interview. In short, I'd recommend a more humble approach, apply for a role suitable to your level, don't try to outsmart the interviewer, or your co-workers when you get hired, and fulfill the job you've been assigned, not the one you wish you had. So no level-jumping over your bosses to make smart comments; that won't help you... I speak from experience, and it took me a long time to understand that a good employee is just someone who makes their managers life easier, by completing their tasks and making sure stuff gets done.