Not to mention that building new plants can take a decade and costs a fortune - if you invest that money into renewables and power storages you have working power much faster.
Also OPs graphic is a real problem but it only goes until last year where we just got rid of Merkel. Her party was actively working on making it as hard as possible to work wind turbines while investing into gas from russia so with the new government the speed should finally pick up again
Of course shutting down existing nuclear reactors is a bad idea (which also happened because of Merkel) but that decision was made so long ago that the companies running those plants prepared for them to shut down for a decade and have stopped hiring people, the ones working there are on retirement contracts and they didn’t invest into future proofing the plants anymore so they were kind of falling apart