Some have said that it is a little slow for BIF.
I don't remember any of the early bad reviews that mentioned BIF or any sports in their tests, just people walking to or away from the camera.
Since so many of the bad reviews were well before the Z7 was available I suspect that some of the main anti-Z channels were motivated by the fear of lost sales. If they gave glowing reviews for a camera not available their review might cause viewers to wait until later before buying anything and their income from affiliate links would suffer at the time. These video reviews are done by people who earn their income, not from photography but Youtube channel views and commissions on reviews.
A good friend of mine is a social media marketing expert told me between affiliates links and ad revenue millions of dollars income is generated by the channels with over 1 million subscribers. She estimated that the Northrup's generate $1.7-2 million dollars a year from Youtube ad revenue, , their sponsor direct payments and commissions on people clicking on the links. She did not include the revenue from selling books and workshops. They stood to lose $100,000 or more in lost revenue for freezing the market if they gave a glowing report on the camera.
The fuzzy hair gut makes a lot less, maybe 1/3rd but for a guy who is not really a photographer(for a while he shot concert photos for local NYC grunge and post-punk bands at one time but there is no money in that and there is also no interest in the quality of images.
The angry guy who changed his channel name several times is hardly a photographer and brags how he has no affiliate links but does not mention he gets $300,000-400,000/year for ad revenue directly from Youtube. He is pushing Fuji now so had a strong incentive to bash a camera that would put a serious dent in his Fuji fan base if they wandered off to Nikon. He was the one who cashed the hardest and still claims it is a total failure of a camera and only idiots would buy one.