Question about news sources and Google

Among other news sources I sometimes look at Google News on the iPad. It insists on showing me lots of MTLBlog junk even though it isn’t one of the sources I selected and it’s far from being a reputable news source.

In addition some of the other “sources” offered are more like PR outlets and you can’t add additional sources you prefer.

Am I being thick here and missing something central in how the app works, or is this thing broken on purpose and I should simply go back to twitter as a general aggregator?