Chelsea will find it difficult to achieve success if club officials and managers don't share the same ideas in looking at the future, this could be a factor in their failure every season. Pochettino wants to have greater influence in player transfer matters, his goal is clearly understandable, Pochettino wants players according to his strategic needs. In Todd Boehly view, Pochettino wishes are considered to be contrary to his policy, which in my opinion Todd Boehly prioritizes building a club with young players. Ideally a good squad is a mix of young players and mature players. As the next successor, Enzo Maresca will certainly tend to think the same as Pochettino in terms of building the squad. In my opinion, Chelsea future really depends on how big a role their manager has in building squad depth.
The club "owner" is the real problem, well not a problem at all but just the expectations is the one. They are spending way too much money and they are building a team for the future as well, but Chelsea is a big club and normally they are used to seeing something right away, so building a club for the future is their issue right now.
If you take the money they spent this summer, and previous last summers, which can only grow bigger if they buy anyone more this summer, we could say that they could have bought players who are ready right now and could go for top four easily and even try for a title. Doesn't mean they would have won, but could have been much better than what they have right now. The downside is that they would have to keep on buying players, this way they are building for the future.