I've never heard this Starships shyt, but if it is like 100% singing would she have even done that record live? Plus she had a bunch of guest appearances apparently, so she probably would've kept it Hip Hop. So...Rosenberg as a rep for the station was within his rights to shyt on a blatant pop record she probably wouldn't have even performed. It's not like he was like "this ain't no Beez in the trap" or whatever, knowing that would be one of her set's biggest songs
And even beyond that he's just one DJ out of many on the station, he don't speak for the station's consensus, people giving him too much power. Don't certain DJs on stations hold grudges against certain artists and all that...noone's up in arms about that