Their goal was to reduce emissions 40% from the 1990 levels by 2020, they are on track for a 32% reduction and have said they will no longer focus on meeting the 2020 goal.
And you might be going "A 32% reduction is still good, right!?" The point of the article is that, if Germany can't achieve emission targets set in response to various agreements, most notably the Paris Agreement, then how could anyone else possibly do it?
Because in Germany, all sides of the government are on board with the green energy push and they have/will invest over half a trillion dollars in said push... And even with that they were still significantly short of the emissions reduction goals. While in most other nations there isn't the same consensus on the push for green energy and nowhere near the same level of resources being devoted to it.