Tasering someone multiple times is torture. I have seen cases where people were tasered over and over even when they weren't resisting, and in cases like that its police torture, and it is very wrong.
Harder labor isn't torture as long as you don't work them until they drop. If you work them until they pass out from it, then yes that is torture, and its against the law and stuff.
Court isn't torture and you know it. That is just you being argumentative. There is no physical distress involved, nor is there any physiological abuse done to the person.
Lets look at the reality of things though. The fact of the matter is torture is a very minor thing in the way of our daily lives. We don't see terrorists on the streets, they do not attack us, there hasn't been any attacks since 9/11. Terrorism was totally overblown to begin with. We are not in any real danger from them, and so even if we wanted to agree with you, we would not. Because there simply isn't any real threats that we need torture to stop.
To answer you question though, why do we hate people who torture others? Because torturing is an evil act. We are against torture, its in the US constitution. Torture is not tolerated, and it never should be.
You know what? You like using bad examples to prove your point and you keep going to the extreme. Saying long trails are torture, so let me do the same. I will use a horrible disgusting example.
You have a terrorist who had planted a dirty nuclear bomb within a major city and you knew it would go off within an hour and he has resisted all torture so far. You have his baby son though. If you knew for a fact he would give up the information and you would save everyone in the city, would you put the babies head in a vice and crush its head while he watched?