In short, due to inadequate military planning, completely failed intelligence and some smart moves by Ukrainian military, Russia failed to destroy Ukrainian Air

In short, due to inadequate military planning, completely failed intelligence and some smart moves by Ukrainian military, Russia failed to destroy Ukrainian Air Defence in the first hours of war and this failure predetermined the rest. With air superiority Russia could reach their goals in the first months of war even despite the resistance. They could not operate freely in Ukrainian air and now with Patriot and IRIS systems deployed it is completely impossible. What has happened today is hard to explain. Probably lack of command and coordination between FSB and military.