Granted, majority of City fans will be glory fans yeah but not I. City can not win anything for decades again and I wouldn't leave them.
Also, it isn't supporting other leagues that's the problem. I encourage that, hell widen your sporting viewing by following another sport too.
My massive problem is idiots who support the champions or actual powerhouses of other countries. Being a fan of a good team is fine and dandy, being a fan of all champions/runners-up/champions league/europe teams in every league isn't.
Support the Fulhams, west broms, or stokes of other countries.
Put it like this:
Supporting United and Real Madrid/any other league powerhouse.
Supporting City when they were irrelevent to most people and a team that's 2 years old.
You're looking at that wrong. My problem isn't you're supporting more then 1 team in other divisions. That's fine. Supporting no-one but champions or a team that will probably win at least 1 thing per season with ZERO teams that have very little to fuck all chance of winning anything/being midtable isn't fine.
That my good sir, is a bandwagoner.