A lot of the anti-Grier guys are posters who just like to be seen as 'edgy non-conformists'. Grier's hits-to-miss ratio is actually pretty good, and because of that, those who like to trash him will generally play up one or two bad picks and work those picks up to be heinous disasters... OMG!!! This pick was SOOOO bad... while pretending that Phillips/Holland/Tua etc... don't exist. OMG that pick INVALIDATES all the good work!!! Infinity!!!
It's kind of funny really.
A lot of the same guys used to trash Grier's FA work... or his trading... (Both of which are also net positives), but now they just sort of quickly grant that Grier has won in those areas before pivoting to players who could have been drafted instead of our busts.
There is no summation logic here... just animus and the desire to throw a tantrum. Logically, these guys can not be reached... They'll always pivot to some 2nd or 3rd round successful pick without ever granting that every single GM in the League passed on that player at least once... I just chuckle and move on generally, but sometimes I'm amused enough to play along.