I've made it through the Grantham part and here are my thoughts so far:
1. Did this writer ask Grantham for a comment? I can't find that he did, but I feel like a 'declined to comment on this article' sentence is usually included in these. If he wasn't asked for a comment, then I think that's a mistake on the writer's part. Also, implying that a former player refusing to comment is more of an indictment than what comments were actually made is kind of irresponsible.
2. I don't think the 'displaying a complete lack of care for their personal space' is a big deal when we're talking coach-player relationships. Nobody is saying Grantham grabbed them or shoved them or anything. Getting into a player's personal space is part of coaching, especially in the heat of the moment.
3. Grantham being inaccessible or acting aloof towards the players, I feel like, IS a big problem. I feel like that has to be the flip side of #2 above. If you're going to break them down a little bit, you need to help build them back up. Sure, growl, make faces, yell at them about what they did wrong, but you're a coach, COACH them on how to do it right.
4. Using increased playing time as a carrot for players lower on the depth chart and decreased playing time as a stick for players higher on the depth chart is a pretty standard motivator for any team on any sport after you leave little league, so I'm not sure why that was specifically pointed out as something special.