I don't like Pochettino's coaching style. He likes buying already-established players. I will not be wrong if I assume that he depends on big names to win trophies. I am more comfortable with coaches that build young players. Coaches that groom unknown players to superstars are the best in the world.
Pochettino is a great coach who loves to play pure attacking football, he of course didn't win any trophies in Tottenham, neither did the club have the money to buy "already eatablished players" like you say, Pochettino did so well to play good football with the players at his disposal when he was in Spurs.
Having said that, Poch won trophies in PSG and that's all the trophies that he has won, mind you that most of the transfers that take place in PSG is done solely by the club, without even the managers consent, and that's the same thing happening in Chelsea now, Todd Boehly is just buying players left, right and center, none of them have been players that the manager identified himself. Chelsea are doing crazy business right now, hiring too many players, many of which they don't even need.
He's indeed a good coach and despite the fact that he didn't win any trophy with Tottenham and didn't had much financial backings from the board to bring in world class player he still managed the play good football with the average players he had, even finished as league runner up in 2016/17 season and even. Made Tottenham to play their first Champions league final in 2019 before he got sacked and moved over to PSG where he had opportunity to win trophies.
You're right,I think they've bought too many players than they even needed even bought two players playing in same position and i think Todd Boehly is spending too much on trying to build a very strong team and he should learn from PSG'S mistake, where they bought lots of top class players but it didn't turn out good amd they had to sell them off this season, well Pouchettino is an experienced coach and I expect him to handle the situation and work with the players that comfortably adapt to his style of play.