How good was the soviet air force?

[special ed]

In the news media, it always pilot error. How will it be reported when planes are flown with no pilots?

 

[SaparotRob]

A minor glitch.

 

[Dimlee]

I take any information from the former USSR about WW2 with skepticism. It was a closed society. When you look at the numbers of tanks supplied via Lend Lease, about 1 in 5 tanks on the battle field would have been Western, but its rare to see photos.

the old Soviet saying about Pravda and Tass, there's no news in the truth and no truth in the news.

Your scepticism is justified. However, 15 countries with different information policies represent the former USSR today.
The problem is that most of the Soviet WWII archives (including tons of documents from Germany and other countries) are in the Russian Federation. There was a golden period for researchers in the 1990s-2000s when many of those archives were accessible even to the common public but it's over now.