Since you're committing to a horizontal scrollbar, why not increase the size of columns and position the content so it feels like I am reading/looking _down_ (from top to bottom) not everywhere all at once.
Also, a better scrollbar design would be nice + individually making sure each column can be understood where it is from. In other words, some kind of a heading indicator. (You already use Icon + Source name but I feel it isn't enough.)
Maybe you already got all this planned out and you're busy with the algorithm stuff instead, if that is the case - sorry.