Totenham has quality players. I mean they spent to buy players unlike what you said. Just check the front line of Totenham squad. They have;
1. Harry Kane,
2. Son,
3. Richardson.
These are quality players that can get any amount of goals to give a team title win. But I don't know what to say about Totenham. Ot could be that the management is the problem.
They are quality players but they had a terrible back to back season at spurs bar Harry Kane. Richardlison went all season without a goal to his name at Tottenham Hotspur; i do not see how the team wants to win the league title with such terrible return. Even Son struggled to impress last season which led to Spurs dropping out of the champions league spots in the League.
Is it a coaching problem? i don't believe so, Players form dip and theres nothing unusual in that aspect; The new spurs coach will hope the lads bounce back after a bad season.