Pochettino looks like he will fail to build a new era for Chelsea, he only marked its revival with transfer market movements, not with match results. If we wait longer, I'm not sure Pochettino will last more than two seasons at Chelsea. It could be that if the Blues suffer another defeat in the EPL, then he will leave sooner before seeing the players he recruits develop well.
I think if Chelsea loses to a club like Liverpool or Man City it still makes sense, because they are fellow big clubs. However, losing to Nottingham Forest clearly disappointed all fans, I think.
I don’t know if I am the only one who remembers that Pochettino had Messi, Neymar, Mbappe, Sergio Ramos, Verrati and many other top players all in one team and couldn’t atleast reach the champions league final with PSG. I don’t have much faith in Pochettino to do great things at Chelsea, Chelsea have good players but lack a real experienced coach to manage this team and groom this players to reach full potential that is what I think Chelsea is lacking.