I do not not where you live but if miles from Brighton and your boss phoned you tonight saying I want you to work permanently in Brighton from tommorrow, you would just do what he wants and leave even though you have no idea what Brighton is like or the job prospects there etc. I know transfers do go through at the last minute but Janssen is not English and did not know the area like others would and it was certainly a demotion from Spurs.
I think criticising him for this is very harsh. He may have thought differently if he had a few days to consider but he was in Europe playing for his Country. Not even a face to face meeting.
He should have googled Brighton and fucked off