It's a great question generally. I don't know how any manager can be successful if successful is winning trophies regularly or challenging for the league regularly. We've won 2 league titles in almost 150 years and it seems like some of our fans won't be happy unless we are regularly winning trophies and pretty much always challenging for the league. We also don't compete on wages by design but the club always puts out statements that indicate the expectation is "top 4 and competing on all fronts". So expectations from the club and the fans are unrealistic in comparison to the resources we provide.
So it's almost impossible for a coach to meet expectations at Tottenham. However, my comment on Ange is about his style of play and its suitability to coaching at this level. From pretty early on in his first season, I was always very concerned that he was too focused on offensive play to get the most out of what he had results-wise. I stand by that but fully acknowledge that I'm judging him at an insanely high standard against the absolute elite in the game. Despite that being my opinion on him, I think he's an excellent football manager, a very intelligent guy, a very engaging speaker and has admirable ideals. And, to be fair, there were many games where I really enjoyed watching his team.