That is not it at all, he and all 3 clubs had agreed terms. It was 100% down to him which club he chose.
Why not, you seem to think he is an unknown person in the world of football.
He used the tactics which suited the squad he has at the time. He got sacked by West Brom because he tried to play expansive football with players not good enough to do it. If anything with the way he played last season just shows how great a coach he is being able to play a system which is not his. A lot of your recent comments have been more wishful thinking than logical im afraid.