Did Sarah ever think that maybe Judgment Day was for the best?
Yes, a dark future where half of humanity is dead and having to fight robots is very grim indeed, and I can totally see why she freaked out and tried to stop it from happening.
But I wonder if maybe there was a part of her that figured, after the the events of the movie (I only count T1 and T2 as canon since James Cameron is getting the rights back in 2019 and will most likely only count T1 and T2 as canon), that maybe Judgment Day was for the best. Why? Because perhaps humanity was on its way to destroy itself anyway. If SkyNet didn't do it, maybe World War III among humans would have. And maybe the only way for the human race to survive was for it to be "humbled" by having them nearly wiped out, only for them to rebuild with much wiser minds.
I know that T3 sort of play around with this idea (i.e. "I should have realized it was never our destiny to stop Judgment Day, it was merely to survive it, together.") but not in the way that I had in mind.
I'm certainly not talented enough to write my own stories, but if I did, I would write a Terminator story about how after T2, Sarah tried to stop any attempts of SkyNet being made but gave up after a while only because she realized that humanity itself was heading towards World War III. Thus, she became jaded and figured that John Connor was destined to win the war against the machines anyway, and intentionally let SkyNet be developed.
You must defeat Sheng Long to stand a chance.