Thing is, the ones "exposing" them are already known as corrupt from multiple previous scandals, now all they did was get some people on camera which say that the other side is also corrupt. While none of this is good, I'd still vote for the ones supposedly somewhat corrupt instead of those known to be fully corrupt.

Yes, pretty much. It's much more obvious if you take into account the Počivalšek leaks before the previous elections and compare the media response to this time.