I’ve read plenty about these specific criticism of the FISA system in the media I consume, which is often decried as being “left-leaning”. Indeed the article here by the New York Times is a good example.

So I doubt “the left” is suppressing this issue. The IG report is pretty clear that these issues had little relevance in the investigation of Russian hacking. And if our discourse can no longer achieve this (rather low) level of nuance, we are truly lost.