Of course you are not saying Pochettino is a bad coach, but in the end you are just conveying the impression that Pochettino does not have the ability to make Chelsea better or even compete in the top four. If Pochettino hears about it then I think he'll be furious, of course. Lol
Chelsea fans must be patient to see the process that Pochettino is going through in building the quality of his team in this relatively new season. Their statistics are not good, but improvements will continue to be made so that Pochettino's plans are truly successful. Nothing is impossible in football, in fact no one really believed Newcastle could qualify for the Champions League this season when they started last season.
Of course if he is belittled he will get angry. Lol
Basically any coach who comes to Chelsea will be considered unsuccessful in bringing his team, moreover their squad has great players but this is their opinion maybe it's not a Chelsea fan, if a Chelsea fan might say differently about Pochettino.

Trust the process because this will not be easy, it could even be 1 season more to stabilize the team, many people think Chelsea spend too much money on players but the quality of their players' play is poor, I think maybe it hasn't adapted well.