I mean they have been winning the league so many times, they are the ones everyone hates because they keep winning, when you win that many times and not let anyone else have any fun, then of course you will be hated.
And when you are hated, people are going to cheer when you are down, and City is as down as it gets right now, they haven't had a win in seven games, I do not think that could get any worse for them, they should win their next game with ease, if they fail to win again, that's going at unbelievable levels. In the end, we are going to see them win, but cheering for them to lose is a very normal situation, City fans cheered enough, it's been years since last time we saw anyone else cheer, hence why it's normal for others to cheer as well.
It's a normal thing you know, I remember how people will troll Real Madrid when they lose in the Champions League and will not celebrate them when they later win 2 in 3 season, that's the faith of Manchester City in the hands of haters but this is just a phase that will.be forgotten, there is nothing new here thag is happening to Manchester City that hasn't been seen before, if you are not been hated for what you are good at, then that means you are not doing it right.
It took Guardiola years of try and error in the squad he haa built over the years which works for him for 4 season in a row, even this shall has a solution very soon. Haaland and KDN turns things faster for Guardiola in two years, if this guys doesn't improve I'm sure there are some good boys preparing of them to be replace very soon, and the team will comes back to it's previous form, I'm even certain Guardiola will relief some players of their contract next season.