Well, I haven't lost my objectivity, but I have lost a lot of tolerance for things like denialism. It's one thing to not understand something, or being incapable of understanding something, or simply have a different take on something, but to simply deny it because you don't want to believe it when the real evidence and proof is there in front of your face.
Basically, it's like watching Bait Car. A person is caught stealing a car on tape, and in some cases shown the tape and they still sit there and deny they stole the car. That kind of stupidity I no longer have any tolerance for. That's just the kind of thing one can't really be objective about. Not to mention dishonesty and dishonest tactics.
For objectivity, I want to see real evidence, not just claims, anecdotes, and arguments. It's the evidence that will convince me of something is true or not.