Well if his rumours are to be believed, his attitude has contributed to him not playing.
weren't there also rumours of not playing due to having a contract minutes clause also? And he must have an extremely poor attitude, and it must have changed from last year when he played a lot. Not wanting to recontract is not a reason to not play a player, especially when you've already released a striker and have few strikers on your books, and a smaller than regular squad.
Not sure the problems are all Boyd's here, until I hear otherwise. I mean in basically one of his only hit outs he's got two goals. Surely the club and manager's role are to manage talent?
Perhaps he developed an ego given how much he played last season. Apparently he was shooping himself around the US but got no interest.
Until there's evidence to support this, don't think it should be plastered all over the forums. Not unusual for players (or anyone in any other job, for that matter) to try and sniff out better deals.