He's taking flak because he slagged off those very same players when we signed them (Higdon being a classic example, but there are many others).
He also complains about the level of every player we sign and points out we should be signing much higher quality without ever providing a single example of any player we could have signed that meets those criteria.
It's pointless, boring and a pretty tired trope for every player we sign to be labelled as useless before they even turn up at Fir Park.
"It's all about opinions" is why climate change deniers still get air time on TV and some people in the US still think Trump is president. Sometimes wrong is just wrong and trolling is just trolling.