Terminator is better than Terminator 2, and as cool as it is Terminator 2 should never have been made (or should have a different script).

I know the mob is raising the pitchfork, but hear me out, there are two main ways time travel can solve the grandparent paradox, these are Singular Timeline (i.e. something will prevent you from killing your grandfather) or Multiple Timeline (you kill him but in doing so you created an alternate timeline). Terminator 2 is clearly a MT model, because they delay the rise of Skynet, but Terminator is a ST movie. The way you can understand it's an ST is because the cause-consequences form a perfect cycle (which couldn't happen on an MT story), i.e. Reese goes back to save Sarah -> Reese impregnates Sarah and teaches her how to defend herself from Terminators and avoid Skynet -> Sarah gives birth to and teaches John -> John uses the knowledge to start a resistance -> The resistance is so strong that Skynet sends a Terminator back in time to kill Sarah -> Reese goes back to save Sarah...

The awesome thing about Terminator is how you only realise this at the end of the Movie, that nothing they did mattered, because that's what happened before, the timeline is fixed, humanity will suffer but they'll win eventually.

If Terminator was a MT then the cycle breaks, i.e. there needs to be a beginning, a first time around when the original timeline didn't had any time travelers. How did that timeline looked like? John couldn't exist, which means that sending a Terminator back in time to kill Sarah was not possible, Reese couldn't have gone back without the Terminator technology, which they wouldn't have unless the resistance was winning, and if they are winning without John, the Terminator must have gone back to kill someone else and when Reese went back he accidentally found Sarah, impregnated her and coincidentally made a better commander for the resistance which accidentally and created a perfect loop so that next time he would be sent back and meet Sarah because she was the target (what are the odds of that). Then why is the movie not about this? Why is the movie about the Nth loop after the timeline was changed? The reason is that Terminator was thought as a ST movie, but when they wanted to write a sequel they for some reason decided to allow changes in the timeline which broke the first movie.