The fans are not grateful with EPL title, and who told them that City can win it again. It was by luck that City used to win it last year for the first time in history. City is in their best form but they are not improving the form. They are stagnant and if Pep leaves that is when the fans will know that Pep is the best coach they had.
Next season will also be a difficult one for City in the Champions League, they should just hope not to meet Real Madrid early like this past season, if not they will not go far, because Real Madrid squad is deadly currently with Mbappe.
Always wanting to achieve high achievements, that's what I see from a team's supporters, so that when they don't get what they want, they will be a little disappointed even though they get the domestic league title.
I think they also have to be well aware that in the Champions League everything becomes more difficult. They also just won their first title last season after trying for years. and even Paris Saint Germain, who regularly plays in the Champions League, also finds it very difficult to get, Atletico Madrid also feels the same way.
However, this is very natural because as I said before it will be more prestigious if they succeed in retaining the Champions League title. But it's not easy, only Real Madrid fans in my opinion know what it's like to be the "masters" of the Champions League.