He's not, no. Certainly not on an interview done through the club's official channels - it'd never see the light of day and would undoubtedly have repercussions.he’s hardly gonna come out and say ‘mykolenko is pony and the old man doesnt know ball’ is he?
He could, however, quite simply have declined the opportunity to put an interview out, if he is unhappy with how he's being treated.
We can summise about the situation and his happiness with it all day long but ultimately, based on the evidence publicly available, there's nothing to suggest he's remotely unhappy at the club.
I suspect if he wasn't happy he'd have been more likely to have agitated for a move whilst the transfer window was open rather than put out a gushing interview stating how much he was enjoying his time here. Wouldn't you?