Yeah, I don't think character assassinations are necessary - it's likely he was dropped, didn't really like that, looked for other deals, found a better deal and now he doesn't really care about this season.
He wouldn't be the first footballer who has acted this way.
That being said if he does not care about the season i.e. attitude, then as coach, you move him to position 23. Professionals see the job out to the end because they are being paid to do so. Look at Brockie as a shining example. Its also not a character assassination at all in my opinion. I met Boyd once with my grandson and he was very polite with him etc but are we talking about all the stuff he does with the fans and the community or are we talking about what he does with the team. Ahmad Elrich was reported to be a stand up guy but how was his attitude when it came to football and the team?
Unfortunately with some things, perception is reality.