What will happen if at the end Russia succeed in her conquest against Ukraine and take over the economy of Ukraine. That will extend the economic power of Russia no doubt and that will make Russia more powerful.
How will EU and NATO countries relate with Russia if that happens ?
Who are the allies to be identified with Russia? As at now every businesses, companies and organizations were departing the country and no one has come out boldly to make a stand with Russia, meaning that all that Putin is doin is unethical and not tolerated by any culture or continent, it is believed to be an act of massacre, even the millitary that goes into war always have a plan of rescue of the innocent citizens, females and young ones.
Putin has already lost the war in Ukraine. The Armed Forces of Ukraine inflicted such colossal damage to the invading Russian troops on the manpower and equipment of the invaders that now Russia is turning to China for help in military equipment, and in Syria and Libya is recruiting volunteers for the war in Ukraine. The image of the invincible Russian army has been irreparably damaged, but that's not even the point. Putin and his military leadership have made many mistakes by counting on a quick victory over Ukraine in three or four days. Russia now can no longer defeat Ukraine, and they have already realized this there, so they simply destroy any of its infrastructure in anger, because they know that it will not be captured and will not belong to Russia.
On the other hand, the imposed sanctions will work and continue to have a devastating effect on the Russian economy, even if they are lifted in the near future. Therefore, soon Russia will become a poor state, if it still retains its territory, which I deeply doubt.
While without a doubt Russia expected to win this war under a week and now they are frustrated this is not the case I doubt that they are destroying the infrastructure out of anger, this is nothing more but another example of total war, in which the invader begins to destroy anything that may have some use for the opposite army with the hopes of demoralizing them and at the same time to cut short their supplies, this means Russia is taking more seriously the war and it is just one more indicator that tells us they are not going to back down on their decision to invade Ukraine.