I am a Liverpool fan and when Klopp has decide to withdraw from his position it's break my heart because i love him

Management does not need to fire Pep Guardiola because his contract will expire at the end of the season, if they start to be dissatisfied with his performance due to the negative results achieved by Manchester City, then there will be no negotiation of a contract extension at the end of the season. Although Guardiola position is currently safe, he also has the responsibility to resolve the problems that occurred in the last four matches. Manchester City is threatened with not being able to continue its dominance if it does not immediately improve its quality and it will be an unpleasant farewell if the club and Guardiola decide not to continue their collaboration.
Correct, Manchester City has to worry about Pep, all they need is looking the results in this season, then they will decide to extend Pep's contract or search for new coach. Any coach will want to manage Manchester City because they're the strongest team in Premier League and full of star players.
Pep is just trying something new, look how he not include De Bruyne as a starter, it's make sense a new thing will not always successful.
The moment when Klopp left Liverpool everyone could expect to see a bad performance from Liverpool after this coach leaving the team because of the perfect performance we saw from Klopp for years in Liverpool. Even the other coaches knew accepting the offer to work in Liverpool would be a huge risk but Slot started working there and he had perfect performance in this team.
Even Guardiola in Manchester City with all his reputation couldn't get enough points to get in the first place at the table because of the perfect performance of Slot.
They won the game against Aston Villa recently with a 2-0 result and now Liverpool got 28 points in the 11 games they had.