Yep, Europe got in pretty deep with dependency on Russian energy. Their "addiction" really got going when the Chancellor of Germany, Gerhardt Schroeder, pushed for building the Nord Stream pipeline and started pimping for Russian energy exports. After he got done leading German, he started working for... Yep, Gazprom. He's still BFFs with Putin.
That addiction will not go away overnight. You could ban Russian energy exports across Europe. That would send prices through the roof which would result in Russia selling less product for more money. Not exactly the desired result we're shooting for. I know it sucks, and our administration has shot itself in the foot recently on all things energy. But we can't just flip a switch.