I am not sure this prediction of -30% by the end of the year is legit, to be honest, but it's good if it is. That being said, if exports are up by so much, why is the prediction so negative?
I think that the Western countries want to show and prove that their sanctions are serious and are working, while Ukraine is pressuring them for imposing much more because the idea is to help stop the war, and if Russia keeps going with the war, it means the current sanctions aren't enough. Also, while initially it looked like Russian economy was exploding, they managed to stabilize the ruble and 4 months into the war they can still afford it, although the consumer prices did grow significantly for Russians, so it's not like sanctions didn't do anything.
Understand a simple fact - Russia imagined itself, for some reason, as a significant country, and decided to "bring everything back", in fact, to recreate one of the most bastard states - the USSR, and gain control over all the former countries, the socialist camp, during the Cold War. As always, Russia fights only against the weakest, those who cannot stand up for themselves, this is such "Russian heroism." If not, give at least 1 example, Russian attacks on some country that would be commensurate in power? But I'm sure no one will give a single example ...
So, for some reason, they decided that Ukraine is such a suitable object, all the more so as an example of how to deal with thieves presidents. This scared Putin very much, because. for him, the overthrow will be even worse than for Gaddafi ... And if now in Ukraine, by the forces of Ukrainians and Western partners, the new brown plague of the 21st century is not defeated, rashism, rashism will go further west. The next ones will be the Baltic countries, Poland, Georgia again, and many others. And one of the main ways to destroy rashism is precisely economic sanctions, which should destroy the economy of the terrorist country, as much as possible and preferably irreversibly. Well, or soon famine, war, hundreds of thousands of deaths will come to other countries, on the bayonets of rashism. The choice is ours, what we choose - peace, tranquility, order, creation or death, devastation, deepest stagnation, and other "joys of rashism"