Why did the Russian economy not collapse despite the huge economic sanctions decided mainly by the Western powers?

The decrease of the Russian GDP is only -2.2%, which is very far from the forecasted decrease of 8.5%. And the Russian economy is not expected to fall any further and is expected to rise slightly with a growth of 0.3% just slightly below the Euro zone which is 0.7 and should even exceed in 2024 the Euro zone with 2.6% economic growth, for the Euro zone it will be 1.6%.

And beyond the rather meager results of economic sanctions, the political objectives of these sanctions are a total failure.
Why did the Russian economy not collapse despite the huge economic sanctions decided mainly by the Western powers?
Why did the Russian economy not collapse despite the huge economic sanctions decided mainly by the Western powers?
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