There is also another reason like how pochettino keeps use boring strategy which is putting jackson as central striker. Pochettino forgot that if chelsea doesn't have good attacking midfielder.
Pochettino was also the problem for chelsea. Chelsea's players are not also having confidence in playing the game. It can be seen from how chelsea players were missing a lot of opportunities.
There's no someone who can position himself properly during the game to receive the deflacted ball. There are many problems in this club that may not be solved in a short time. Chelsea needs to work even harder for sure.
It's caused by this club may still stay at the bottom till the end of season.