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.