Many managers have come and gone is same fashion and some of these managers have moved on to new clubs and are doing better. Conte for example is doing better with Napoli and Napoli are currently leading their league table so sometimes these problems are deeper than we see and ascertain them to be. The management also need to look into their affairs, policies and strategies to see if a change has to be done not just being so quit to put all the blames of managers.
If they could have done that, they would have done it a long time ago, but the result is that Tottenham, who seemed to have started the season cheerfully, are now just as cheerfully failing it. The scariest thing in such a situation is that everything seems to be done correctly, but there is no final result in the form of a title, and it's okay when it comes to cup tournaments when the element of chance plays a role. The most important indicator is a smooth championship, when everyone plays with everyone, and if it doesn't work out there, it means that the development vector has been chosen incorrectly. I think Daniel Levy could have left on his own if he had won the title, but that's not happening and it's driving the situation even further into a dead end.