I agree that existing Android devices make the Ouya superfluous, but not your phone or tablet unless you sit right in front of your television thanks to most Android apps assuming they're operating on a touchscreen in your hand. (Even then, many tablets reuse the charge port for the mini-HDMI connection, forcing you to run a device that's physically connected to your television on battery.)
However, I think it's telling that you mention "Angry Birds" as an Ouya game you can play on other platforms. Actually, you can play it on the three last-gen consoles, but not the Ouya unless you sideload it and do some work to map the touch controls to sticks (if that's even possible, since your launch point moves from level to level) or use an air mouse. If you actually had an Ouya, or even spent 30 seconds perusing their game list as I did, you would have realized this before perpetuating the "Ouya = Android = Angry Birds" myth. Further, there are dozens of games that are only on Ouya, far more than the 1% you claim (by stating that 99% of the games aren't exclusive). I don't really want to play most of them, and I'm sure you don't either, but they're exclusive nonetheless.
But that's understandable. After all, you have other consoles, a gaming PC, a phone, a tablet. I have other consoles, a phone, a tablet, and a $40 Chinese Android stick that's hooked up to my TV. All my stuff but the consoles is rooted. We are both fiddlers, and therefore we're not the Ouya target market. The people who are in that market, like the vast majority of game console users, don't want to buy something, take it home, then go on the Internet and read forums to figure out how to root it, order a bunch of parts from Newegg or Amazon because they're too obscure to be sold locally (like my Samsung tablet's HDMI and USB OTG dongles), buy a controller and/or paid software like Sixaxis or USB/BT Joystick Center to make the sticks work right with games, map touch zones to sticks in each game, sideload apps and only then have it behave kind-of-sort-of like a video game console. They want to buy something, take it home, plug it in and start playing games. What is "a tiny bit of effort" to you or me is literally impossible to my sister-in-law, the high school guidance counselor, my niece, the cheerleader, or my father-in-law, the oncologist, all of whom own last-gen consoles and two of whom have asked me about the Ouya because it's a new console. (Each time, I said to wait and see if it takes off, but that I wasn't getting one myself yet.)
It remains to be seen whether that target market is interested in what Ouya has to offer -- I think we'll know by January whether they've succeeded enough to go for 2.0, or failed completely -- but your "5 ways the Ouya game console failed" are really just 4 ways it failed to impress people like us and 1 valid criticism of something that will affect most users (the controller's incredibly poor build quality compared to the unit itself which you'll barely ever touch).
The Ouya isn't for you and me, and isn't very well-executed. But due to the difference in expectations, I'd say the Wii U (which I myself will probably buy someday) has actually had a more disappointing debut.
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