You're taking a contrary tone, but I think we're in agreement here. When it comes to Trump's lie about the 2020 election, the tone of the media in general was

You're taking a contrary tone, but I think we're in agreement here. When it comes to Trump's lie about the 2020 election, the tone of the media in general was dismissive and highly skeptical due to a lack of evidence. The right-wing media was, of course, more credulous and willing to entertain the possibility of widespread election fraud... for a few months. When it comes to collusion conspiracy theory in the 2016 election, the media in general was highly credulous and willing to entertain the possibility--even in the absence of evidence. The media in general pushed this conspiracy theory for four years, while of course the left wing media was more credulous and willing to entertain the conspiracy theory. You're right that Mueller investigation resulted in a large number of charges, but none were related to the question of collusion. The media isn't forgiven for convincing half the country that Trump was a Russian puppet just because Paul Manafort laundered some money (unrelated to the Trump campaign), or because some Russians were running a troll farm (unrelated to the Trump campaign). Why even bring it up in a conversation about the collusion conspiracy theory, if not to muddy the waters?