Your chart doesn't actually show gas prices back to pre-war levels.
How so? War started February 2022, price was 87 Euros at the time. Its 55 Eur today. Its a price point, im not comparing averages. Year just started. Last time it traded at this level was mid 2021.
It is not correct that the "collective West" represents more than 50% of world GDP.
It is pretty much correct. USA is at about 25%, Eu 22%, add to that UK, Canada and other anti-russian partners Australia, Japan, etc. You get above 50%.
Russia's oil and gas revenues are up and its economy is doing well.
Its not. There is a projected GDP drop of between 3-6% and sanctions take time since EU nations were in one way or another buying Russian oil and gas throughout 2022.
And that ofc was when prices were at 350 Eur, now they are at prewar levels and a market for the gas coming out of their main gas field simply does not exist.
once this work is done the EU will forever be deprived of the cheap Russian energy that was the lifeblood of its manufacturing industry and prosperity.
Ofc, the future depends on how EU will deal with the situation. The worst is definitely behind us. Russia had a hand to play, they played it and lost.