I'm trying to find positives about the lad and agree with the point you make.
Their back three had a field day playing around him because he had little, if any, support.
I don't think he would have been a starter, but if he was then the story may have been different.
That said he's had enough chances to impress, and has failed to show what he can do.
He had a half-decent loan spell in League 1 at MK Dons up to the end of December last year scoring 6 goals.
Perhaps, as many have said, he's not good enough (for Cardiff City) at this level.