How many the aircraft the enemy has is irrelevant if they cannot be deployed without superiority.
Russia has lost the air war to modern munitions and reconnaissance. Their bases are hit. Aircraft destroyed in the air and on the ground. The enemy has lost the initiative.
So all it can do is use stand off weapons beyond the range of Ukrainian defences and hit civilian targets.
You don't have to destroy the enemy to win. Just deny him the ability to wage it.