I don't think Pep Guardiola will leave just because he has four defeats with his work. Every team can be defeated, there is no team that cannot be defeated. Manchester City can be defeated too. The important thing is to trust Guardiola a lot considering his past successes. Even if they don't become champions this year, Guardiola himself knows best where to intervene for next year. That's why I think he shouldn't leave the team. If he leaves the team, Manchester City will be the loser. I don't see a better manager in the world right now.
Premier League has 11 match days so far and Manchester City are at a second position, not too bad, and if we see point difference with a club at first position Liverpool, it's only 5 points.
Premier League table shows that even Manchester City got some bad results recently, they are 4 points more than 4 clubs behind, Arsenal, Chelsea, Nottingham Forest and Brighton. The season does not end in November and with 5 point difference, chance for Manchester City is not too small. They can flip Liverpool any time in rest of season so there is no reason for Pep Guardiola to leave the club now.
Yes, there are still 28 match left, haha this is more than enough for Manchester City to have an advantage in terms of points and there are several games that can provide an opportunity to meet Liverpool and beat them.
Everyone should be able to realize that this decline occurred because of the player crisis and there is another opportunity in the future to fix it, this is not Pep fault and he has worked very well, it should always be believed in him that in the future everything can be handled and Manchester City can get back on the right track.