I'm still going to root for him as a Cubs fan obviously, but I recall being mocked a bit when I was vocal in that being a bad trade. I was always curious why people ignored his mediocre FIP and his inability to pitch 150+ innings in any one of his professional seasons. He's neither durable nor above average in the innings that he does pitch.
They picked him out of all the other pitchers that were traded last off-season - whether that was Harrison, Alcantara, Gray, Peralta. I think we can objectively say that Cabrera has been the worst of that bunch. They deserve to be criticized a bit for the move. I understand the logic of why they made the deal but the results have been brutal.
Fortunately, like you mentioned, the pieces they gave up in that deal aren't exactly lighting it up.