You say that because I don't know the real situation in the Russian army. You just repeat the thesis that inspired you Putin TV. Poorly trained army armed with the old weapons does not scare anybody. Nothing you can't do against Ukraine.
Perhaps you are still stuck in the 1990s. The army has been strengthened ever since Putin became the president. The results are out there for everyone to see. Look at the performance of the Russian army and air force in Syria. Is the Ukrainian army capable of doing anything like that?
You can even look at the actions of the American army in Syria and this will not be done by the Ukrainian army either. But the fact is that the Ukrainian army does not need to prove or demonstrate anything. And everything is quite enough for action on its territory.