SUSA is a company is not bad, but they are simply unable to model the KY electorate, and that's why Bluegrass banned SUSA from doing any more polling for them after the 2015 elections.
What this means is that Bluegrass and its media outlets don't have the guts to stand by their own pollster.
If someone does a bad job you're not going to rehire them, like if someone lays down a floor and there's a ton of dents, cracks, and it's barely put together then you aren't gonna "stand by them" and let them lay down another floor.