He's already failed to create a new Chelsea, there's no need to wait anymore as the result will be pretty much similar like the present.
Chelsea will not able to reach top 7 positions, but they're not really as bad as weak teams in relegation zone, at least Chelsea is safe and not relegated to Championship league.
Chelsea must sack Pochettino ASAP before they suffer larger loses.
Well, Chelsea needs to wait and trust the process as they have no other options or alternatives. In the chelsea squad there are average defenders and poor strikers; 0 goalscorers at all and injured creative midfielders. No manager will succeed in such circumstances, and sacking and employing new managers without getting a striker will only push Chelsea project into more terrible circumstances.
The Chelsea team is bad and not good enough; the earlier supporters accepts this, the lower the expectations too.
No one create a new club based on performance from a thin air. There must be some solid foundation upon which the new team will have to stand. Chelsea will not actually build a strong foundation while being in a haste. It will be fine for Chelsea and her management including the fans if they will understand that Chelsea is no more that big club that we used to know before now. When we first come to this realisation, then we'll understand that the journey for Chelsea to come back to the top flight of English Premier League is gradual. Chelsea will not perform woefully because they don't have Champions League niether any European competition, but they need time.