The saddest thing about this whole situation is that a war has been necessary for the governments of many European countries to open their eyes. For decades, almost every member country of the European Union has been a slave to Russian oil and gas, paying billions of dollars every day to the Russian government, instead of using that money to find alternative solutions.
Now that those countries are aware of the amount of money and resources that Putin has for the war, they want to find quick solutions, and we already know that things do not work like that. All the sanctions would have been much more effective if the European Union had not depended for years on Russian energy.