The problem is, you're judging them by the performances they had the squad deliver, based on those squads. Both men recognized how absolutely dire the squad was, and elected for methods of play that would minimize the ability for other teams to punish us. LVG by playing keep away, and only attacking when it seemed to be an absolutely clear cut chance, and Mourinho playing his more pragmatic brand of football.
However, both managers when possessing, non-shite teams, have been attacking. LvG had an all guns blazing Netherlands squad that did very well in 2014, and Mourinho torched la liga with his Ronaldo powered Real Madrid squad.
Meanwhile, OGS has come in, said "UNITED WAY", and while "throwing caution to the wind", has managed a shotless game, games with 1 shot, 30ish% possession.
Stop holding the fact that the squad is and has been a mess against these guys who actually managed to achieve some things with it. At least with possession, the other team can't score!