The guy was the first ever manager to win 4 league divisions in a row in his first 4 seasons and has brought through a host of stars including the likes of Suarez and Eriksen. Even last year he went from a 16 point deficit behind PSV the previous season to losing it on the last day. He also hasn't had any money to spend and had to rely on academy players and cheap signings. Ajax scored 81 goals and only conceded 21 last season by far the best defensive record in the league and the best overall goal difference. PSV the other big team where only eliminated from the champions league on penalties by A Madrid which shows the standard isn't as rubbish as made out to be. Before managing the first team he ran Ajax's academy and was a top player winning everything with Barca and Ajax and has played under the best managers and in the same team as Guardiola who he shares a similar style with.
Frankly I am bemused why we haven't already hired him but where ever he goes he will be a top coach. Shame it won't be for us.