I've not doubted Spurs wish to build a better squad, more that for almost a decade before Paratici too many of the players bought have not been good.
I certainly think by end of Poch's reign he had over played too many of our best players and few if any players had come in to replace them. Plus of course an aging Kane and Son to build a new team round looked a tall order.
But whilst the vocal TFC fans said this summer's window was only a '4' I think it was a good solid '7' with Vicario, Van de Ven, Maddison, Johnson and youngsters Phillips and Veliz signing plus Udogie (bought last summer) playing his debut season for Spurs and likewise Sarr starting to play regularly, and Bissouma playing like the player we thought we had bought. So this season the squad has started to really come together with this summer's signings and those bought in last 2 seasons - so a really good solid base squad to build from despite the loss of Kane, our top scorer and creative player.
IMO most managers would be pretty delighted with this squad - I suspect Ange is - including both Mourhino and Conte although both those two would prefer more defensive players (so not a Maddison) as both prefer negative counter attacking football which has been very successful for them.
So I think Spurs have ended in pretty much the right place, and I think a 3-4 year timespan to totally rebuild the squad is about the right timeframe, but its been a frustrating couple of last years until seeing the squad really start to come together this season.