Overall, does he say anything that unsavoury on the Paul podcast though?
At the start of X Factor, he was supposed to be the leader. Nicole herself even suggested so, and Simon went so far as to question whether he should remain in the Solo category. None of them went into it expecting to suddenly be capulted to mega fame as a boyband, all of them auditioned as Solo artists originally.
In hindsight it'd be easy to feel bitter that you've essentially traded your original goal to join a boyband as the leader, and are soon eclipsed by your band mates. Is it the right thing to feel considering the financial benefit you've had from this? Maybe not, but an easy conclusion to come to considering he was plagued by personal demons at the same time.
And Zayn, he was between a rock and a hard place after what may have been a lot of whiskey. Yes in hindsight he could have worded it better, but I think he did well to remain neutral to say he still supports Zayn whilst not condoning what happened between him and Gigis mother.