In Berlin they also won a lot but the communist party won there. Indirectly they were the party in government of the socialist East Germany. Yes, the one who built the wall and a communist surveillance state for many decades up until 1989. Now they rule Berlin again.
Many want chancellor Merz to resign because his party (christian conservative - CDU) did not even make it into the state parliament in MeckPom by staying below the 5% threshold. He refuses to do so (which was predictable).