Political decisions that lead to that point and geopolitical situation. The russians cut the gas on their terms because it would have happened anyway and they were not stupid. Then somebody else blew the pipe up and the whole discussion conveniently ended. The divestment from russian economy and blocking imports was already established, but germany and others could not phase out the gas that fast.

The German political decision to not join with Russia and invade Ukraine (via Poland?).

Just because it was the right decision doesn't mean there are not downsides.