There wouldn't have been a war between Russia and Ukraine if we had kept ourselves energy independent. Why should Germany and others help the fight for Ukraine when they are dependent on Russia.
"Russia supplies a significant volume of fossil fuels to other European countries. In 2021, it was the largest exporter of oil and natural gas to the European Union, (90%) and 40% of gas consumed in the EU came from Russia." That data should inform you why Germany and others of the EU aren't fighting against their source of energy.