No you're right. Nobody should even be allowed even a few flops . That would mean that every manager including Fergie and Wenger would have been sacked long ago and both are crap in the transfer market (as is every other manager who ever existed) because they have a bought a few flops. Yeah sure...
Your alrite to get away with a few flops as long as you have won the league, so tell me again how long has the waiter been in charge for and how much money he has spent and more importantly how many leagues he has won during that time, now tell me again about flops.