They brought it upon themselves. This is being pushed by the Christian Democratic Union (CDU) and Social Party of Deutschland (SPD), which were confirmed another legislature period of 5 years in April with 64% voter participation.
Decisions are made by those who show up. Now they'll have to live with these idiots in parliament until 2026. I feel for them, but if ~40% of voters can't be bothered to show up to the urns, you have a large part to play in the reason for this even being possible.