I mean.. what does russia gain? Even worse political relations? Germany will fix it system in a day or two, and then what? Does anyone actually expect them to ditch wind power and buy russian gas after russia hacking them?

Realistically... by stirring the shit up in europe, the country that gains the most is.. well.. USA. Do something, blame russia, make EU economy worse, worsen the relations, make european countries stop production due to energy crisis, sell them american products, and if things get even worse, sell weapons, maybe even to both sides if things get desparate enough, watch europe destroyed again while their own economy gets a great boost.