The Ampel may have gained control over the government at the worst possible time. Everything is currently shit and people always blame the government, even though some of that is not under their control, which currently places blame on the only three important center-left parties. Thus people turn right.
It's a tale as old as time. Conservatives fuck up so many things that they can't be fixed in the one term other parties occasionally get. And when those then fail to fix everything, people go "see? They're not better. Might as well vote conservative again."
If it helps to put it into more perspective. Those conservatives or CDU somewhat recently visited republicans in the US and figured that it might be a good idea to copy how they do politics in the US to apply it in Germany. But making noise is unfortunately what works even if it's not actually correct or an issue at all.