A Russian government getting about half the revenue it got historically from oil and gas. Equivalent to about about 10% GDP for the foreseeable future. This will accumulate over years... Effectively depriving Russia of 50% of its revenue for the reversal if in 5 years. Country killing.
Russian oil companies barely making any profit, unable to expand production and fing replacement reserves. Killing the future of these companies.
Arab countries making a mint USA, Canada oil and gas companies booming... Australia too.