Derek Riordan says he feels let down by Gordon Strachan after accusing the Celtic manager of 'talking rubbish'.
The Scotland cap has been unable to establish himself at Parkhead since joining the club from Hibernian in the summer of 2006.
He has started just two SPL matches this season and has made only one substitute's appearance for the Bhoys in almost three months.
Riordan, who was linked with Burnley during the transfer window, admits he is disappointed with how Strachan has handled his Celtic career.
"I only get chucked on when we need a goal, so he must think I can get him one," Riordan told Scotland on Sunday.
"But he obviously doesn't want to do it unless he really has to because he doesn't want me to prove him wrong.
"He knows I would score quite a lot if he played me as much as he has played the other strikers, but I don't think he wants to be proved wrong.
"When I speak to him, he's nice to me and says all the things that players want to hear about me being part of his plans, but you know by his actions that he is talking rubbish.
"It is frustrating. I was left out of the squad (for the defeat against Motherwell) and was training with the reserves on Friday.
"I've virtually chucked it at Celtic, what's the point when I'm not getting a chance?
"I feel let down by the manager. I remember him sitting in my mum's house trying to sign me and he said I could play anywhere in his midfield or up front.
"It was the same in the press conferences, but now I can only play left-midfield for some reason and that's not even my best position."