That was exactly what I assumed when I wrote my comment.
The point is that the issue that is relevant to whether or not their behaviour falls afoul of EU anti-trust rules is whether or not they have a monopoly position for search, and whether or not they are using such a monopoly position to expand their reach in the shopping space, not whether or not Google Shopping faces competition or currently does well.
If anything, the fact that Google Shopping faces stiff competition makes their alleged attempt to leverage their search position to expand its reach more serious, as there is an existing market they may hurt through anti-competitive practices.
The (current) EU charges only target Google Shopping and the placement of Googles own products in relation to competitors.