The CDU is trying a Trump/Bolsonaro move of claiming to have won the election, which clearly they have not. They won 28% of the vote, hardly a majority. Besides, their campaign was not just an attack on red, red, and green policy, it went into personal smear mode, and additionally some very racist moves. Now, all of a sudden, they complain bitterly that nobody is eager to start negotiations about a coalition with them.