We're hated because we're successful. We're envied and hated in equal measure because our owners have money to spend and they invest in our club. We're also disliked because there's a sense among some other club fans that we've "stolen" their players - Arsenal fans in particular feel this way.
When Sky telly had a monopoly on the Premier League (before BT & Amazon coverage), Sky Super Sunday was the big day of 2/3 matches.
I remember them always having Arsenal, MUFC, LFC & Chelsea players on billboards and buses advertising the games.
This Big 4 was all they seemed interested in - I bet fans of other teams, apart from City, remember being ignored.
From 2011 we broke into this elite group and perhaps, didn't engage with Sky like other clubs did ?
City didn't have a charismatic, renowned ex-player, manager or celebrity (although Buzzer did try, once) to represent City ?
Unfortunately, City were in catch-up in getting positive publicity.
Perhaps we didn't pay or sponsor enough media people to put this right ?
However, I don't think City or their fans are "hated".
Jealousy is the main reason we are strongly disliked.
Remember, we have knackered LFC from regaining their supposed supremacy ?