I can't speak to any other aspect of federal prosecution. My thoughts about computer crime prosecution definitely can't be extrapolated to my thoughts about criminal justice in general.
Wanncry was a massive black eye of the US Government, I think everyone believing there is zero connection between his involvement in that and this indictment is also naive.
I also fail to understand why you believe "computer crimes" are handled differently than any other type of crime, why you believe the DOJ would frame people for "other types of crimes" but never computer crimes, like there is some prohibition on entrapment when it comes to computers...
They come down hard and they come down heavy on the wrong people, ruining lives. They also pile ridiculous charges even on those who are guilty of minor crimes, threatening to bury them in an avalanche of charges unless they settle. They also seem to be really ignorant of technology, and show a deep suspicion of anything that they don't understand.
Whether this bullying is because they are out of their depth, have a culture of recklessness, or some other reason doesn't matter to those who end up in their crosshairs. If you are a bank fixing Libor, or money laundering (UBS), or are involved in any number of frauds in the financial crisis, you are treated with kid gloves. But if software or encryption is involved, then the sirens wail, SWAT teams gather, and the fear campaign begins.
On the other hand, if you think that the DOJ, while subject to making mistakes, does not often knowingly and deliberately falsely accuse people, then you look at the alleged behavior, and realize that it is well outside the bounds of whitehat behavior.