Mauricio Pochettino got fired because he failed to meet up, it was a harsh decision from the Club's owner, Todd Boehly.
I think it is reasonable that Mauricio Pochettino has not been able to fulfill his promise because Chelsea did experience a serious decline in the previous season and the coach also needs time to be able to fulfill what is expected and since the time he took office as Chelsea coach he has improved Chelsea's performance and managed to finish better than the previous season, even though his contract at that time lasted 2 years if Todd Boehly had been more patient, Chelsea could have been in the top 3 in his second season, unfortunately the club was not that patient and they fired Pochettino at the end of the season.
Todd Boehly's impatience made everything have to start from the beginning again with the new coach of his choice, I see him too hasty in achieving a victory and he does not want to process, what happened before everyone thought Todd Boehly did not really understand about this football sport, now he has spent a lot of money to buy players he likes and he bought a lot of young players I see he is investing. Seeing Chelsea who are currently coached by Enzo Maresca have also never won in the Friendly matches they have played, and of course this makes Todd a little concerned about what happened and it seems that if this defeat continues Enzo Maresca can also be recruited in the near future, because Todd wants something instant, of course being at Chelsea right now is a big pressure for the coach of course it is not easy if Todd continues to punish the coach as experienced by Pochettino actually Pochettino has got his game scheme at the end of the season but the efforts he has made of course Todd ignores, and if Todd does not want to process with Enzo Maresca in the long term I think it will be difficult to ask for a new coach at Chelsea and of course they will not get anything under Todd Boehly's ownership.