Quite possible yes, after Joyce has publicly trashed his own brand, called into disrepute his own management and created uncertainty in the minds of travellers.
Second half is always slightly weaker anyway, but I think that Joyce's public ineptitude has likely cost an extra 100 million or so loss. (At a guess)
Also, now that the Asian JQ growth has been halted the Asian competitors will hasten to kill it off. More losses. More artless management of a failed strategy. Whatever hope there was of selling those dogs has now been dashed.
"Alan Joyce" is the punchline of the worst Irish joke ever told.