The thing is that there’s zero reason to think it had anything to do with Russia. It’s not like it looks Russia-related and the guy being raided is saying “Nope! Nothing to do with Russia here! …”, as you suggest. The only people bringing up Russia are in this thread. (The guy being raided is probably not a poster to this MB :)).
Even aside from that, I don’t know that the guy would have much incentive to attribute the raid to one cause versus another. Especially as the truth will come out anyway.
In general, the FBI frequently takes a very long time before they get to the point of raiding things. And in this case, you would need to date the timing from when the allegations were made in the lawsuit, not from the date of the election.