One could argue it's all he's good at these days but it's not an achievement which should be underestimated, doing it consistently over that period of time with the money other clubs have spent to try and leapfrog us. It's the doing it consistently which is impressive, the last time Liverpool challenged for the title they got 86 points, the following season they finished about 7th. It's ridiculous to say he's 'clueless' or 'inept'.
It shouldn't be the limit of our ambitions though and if we don't win the Cup then he should definitely go, perennial top 4 finishes are impressive but ultimately pointless if that's all we do.