[This is also a bit promotional]
Although I do think Medium is doing a great job of letting you discover some good reading material, I often find it a bit confusing too.
Not too long I co-created http://thetechblock.com out of similar frustration of not being able to find good tech-related articles. Reddit often doesn't show the stuff we find, Techmeme is very Silicon Valley oriented and HN can get a bit noisy. Feel free to let me know what you guys think.