The music does tend to sound the same, but that's because they're just a bland and crappy band rather than them actually copying themselves.
Nickleback has songs ranging from country to hard rock. I think the problem is that the stations you are listening to only like to play similar sounding ones. They aren't my favorite bands, but I feel their non multi-demographic hits are by far their best work.

I just about exclusively listen to the rock station in Vancouver, so I can't say I experience a wide slice of what is out there. Consequently I don't have any rap/hip hop/country artists to hate, as I never hear any of their songs.

#1 by FAR: Tragically Hip. IMO they such, and they are played SOOOO much here. I know so many people who hate them, which of course just creates a self perpetuating feedback loop of hate

Hating someone for producing music you don't like is ridiculous.
You can hate the artist independently of the person. If that makes any sense.