Did anyone blow up the Russian base in Don't Look Up?

Probably yes.

The whole point in Don't Look Up is that the diverting/destroying the comet is difficult, but likely possible, and we don't do it anyway.

It doesn't really make sense that the writers would subvert that with a random technical error that causes an explosion. That would make sense in Greenland, or 2012, or The Martian, but that's not really the point of this movie.

But given the political themes of the movie, and the fact that the US wanted the resources on the comet, this is likely a subtle allusion to what happens to other countries who don't fall in line.

From what I’ve read there were changes to the plot -This is wild speculation on my part but perhaps “originally” BASH ,maybe with the blessing of the US blew up the Russian launch-Just seems that plot element was a removed piece that belonged . But it also seems though they may have decided to leave that part ambiguous . Maybe I’m reading too much into this but when Oglethorpe delivered the news of the failed Russia/China/India attempt at 1:45 of the movie it just seems the mannerisms and dialog hints that there was more to it than “just” the fact that the earth was likely going to be destroyed.

If I recall correctly, references to the joint China/Russia/India mission at least implied flirtation with disaster, so when it happened, (1) it's really no surprise, and (2) it was not malice, but simply an accident waiting to happen.

The base blew up on its own, so to speak. Just like the complete failure of the US' attempt to blow up the comet was due to major malfunctions, so too was Russia's attempt. No country or organization was behind that failure, as the money to be made from the comet was based on disabling the comet and breaking it into chunks, where it could be safely harvested after it came to Earth. Blowing up Russia's rockets wouldn't have benefitted anyone.

I don't think USA/Bash blew it up. Right after the BASH mission failed, China's president texted directly Orlean that the comet was still intact. Would he have done that if they were responsible for such an infamous and villainous move?