Whilst some of those things you listed are true, your comment that Kane is increasingly unhappy is pure speculation and not based in any reality. What happens when Kane signs a new 5 year contract at Spurs in the next 6 months at 200 grand per week? Will that back up your assertion he is unhappy? The fact is, regardless of all the things you listed, Kane IS happy at Spurs. Maybe playing for your boyhood football club trumps turning out for an elite side where you have no attachment?!
Also, he isn't surrounded by players well below his level. He is surrounded by CL level players, some of whom are one of best in their positions in the league? Lloris, Rose, Vertonghen, Alderweireld, Dembele, Wanyama, Eriksen, Son, all have a case of being in the top 1 - 5 top players in their position in the league. So I don't really buy that. I think it's also a bit premature to say a player who as only 3 full seasons in the PL should already have some medals.
Yet again, you seem to think splashing the cash = success. Spurs have never splashed the cash yet routinely finish higher than rivals that do. Good luck to liverpool for spending 75 million on VVD. I'd rather have Vertonghen for 10 million and Alderweireld for 15 mill, both are superior CBs. When you look at facts like that it's hard to criticise Spurs transfer policy.