I could be in the minority here, but putting blame on Ken Holland for Zadina seems almost... lazy??
Sure, he could've drafted someone else, but it's really hard to throw shade when most at that time thought it was a slam dunk. Perhaps he can get a slight bit of blame for using that loophole or whatever to bring Zadina to the pros when he should've maybe spent another year in junior..... But that's about it...
Otherwise, Holland was completely out of the picture less than a year after Zadina was drafted.
Steve Yzerman on the other hand had a little over 3 years where Zadina likely had some positive value as an asset... obviously not equal to the #6OA pick that was used to draft him, but certainly enough to where he could've garnered some measurable return or to be used in a package for a higher value asset of some sort.
Instead, after 2 disappointing seasons, Yzerman signs him to a pretty silly contract that ends up being the catalyst to Zadina being lost for absolutely nothing.
On top of that, if Yzerman's presser was to be believed, before he found out Zadina wanted out he was fully prepared to give him a 4th season on the roster to hopefully figure things out.