AZ had a bigger budget than ajax when he took over...you know the side
koeman was sacked from after a couple of months who had won the league the year before under mclaren
Cocu i think is destined for big things...
Comparitively feyenoord at the time were a massive step down to previous sides who were all favourites for the league other than valencia who expected 3rd place..
he was consideres a success there as he stabalized them and did the same i suppose with southampton.
Would i consider his last 4 years successful or disasterous, not really. So why should he be championed as a top manager when hes not massively exceeded expectations anywhere and had far more failures than successes. When he fails its epic and when he succeeds its from stabalizing teams and keeping their position in the league.