>the media spun a narrative of Russian collusion
No, the media spun the narrative of Russian interference, with possible collusion, something that turned out to be true (interference) and collusion was left uncertain (Muller stated quite clearly that if he could show Trump didn't collude, then Mueller would have said so, but that he was not going to say so).
"'The president was not exculpated for the acts that he allegedly committed,' Mueller told the House judiciary committee, adding that Trump could theoretically be indicted after he leaves office." [1]
Then the Trump DOJ didn't release the summary of the report, but their edited version, leaving plenty out, in order to get people like you to write what you just did. Mueller was so outraged at how the DOJ spun the report, that he immediately did a press conference about it, an unprecedented step.
Here is Mueller's letter to Barr on exactly this [2].
Once Trump is out of office, and several years have gone by without charges, then maybe you can claim these concerns were false, but they most certainly were not fabrications or lies.
[1] https://www.politico.eu/article/mueller-refutes-trumps-no-co...
[2] https://www.npr.org/2019/05/01/719004457/read-muellers-lette...