That happens rarely and this was the situation in the yesterday game where Chelsea lost.This rare situation is when you play in a very chaotic way and you try to win at all cost because you think now it is going to be easy as West Ham was playing with 10 players and as such Chelsea wanted to take profit from the situation by leaving a lot of spaces behind.These spaces were used very well from West Ham who scored goals with penalties because Chelsea defenders were caught in full surprise.I don't think Chelsea will play this bad in any other game that will come.
From the start of the match they should have realized that their defense was not good enough so when the all out attack happened in the last 20 minutes it gave a big gap to the defense which already had a gap before.
Indeed, it was not a wrong way from Chelsea because they also wanted better results, especially getting the advantage of the number of players, it's just that they forgot a little that their defense was not good enough and the penalty in extra time really buried their hopes.
This has to be a lesson for Poche, this one defeat has earned him enough criticism and there will be more if his performance doesn't change.
I also thought Chelsea could do better and it was considered convincing but it turns out West Ham did something unexpected. To be honest, Chelsea's performance was bad in that match, it was really unexpected how they showed a formation with so many gaps for the opponent to penetrate. So for Chelsea, will this setback continue or not? they had to submit to West Ham, while against Liverpool they were able to provide a good defense.
Everything will be clear from the next games (three games with outsiders and the first 2 at home). If Chelsea continue to lose points it will be clear that this is another lost season. If not, then it will be necessary to look at the results of the next games with more serious opponents. I wonder what goals set for Pochetino for the season by the leadership and what is the level of "maximum drawdown" in the process of achieving them.
Next week's match against Luton at Stampord Bridge. If you look at the statistics and status of the two clubs, Chelsea should be able to play better, it's just that when this is not in accordance with the desired expectations, as you said, this season will be lost again for Chelsea and they are still the same as before by not being able to provide real results even with the reshuffle of players and changes in coaches every season.
Luton is a promoted club and they are still below Chelsea's level, it would be very bad if Chelsea lost another point in this match.