Saturn or Shani is neither negative nor positive, only he is responsible for perfect balance in universe. He is judge(न्यायाधीश), who is neutral and gives results according to deeds of an individual. He does Justice with the help of other planets.
Now, whoever is born on mrityu loka or earth is imperfect. Everyone takes birth on earth, just because of some sort of bad deed and then get trapped into the karma cycle.
Now, what? Bad deed? Saturn? Will he remain neutral?
Now, we are living in kalyuga. Will Saturn behave positively?
Saturn’s positivity is very low in Kalyuga. People with good placement of Saturn are very few in this world. Please don’t consider exalted Saturn as positive.
Aspects of Saturn or Shani (Only hint)
7th aspect of Saturn shows the bad karma of any individual. And it is most malefic aspect.
3rd shows the efforts, signified by Saturn or house etc.
10th shows the karma, signified by Saturn or house etc.
All these info of Saturn clears that, he gives good results after good amount of hard work and patience, and results after those are long lasting.
I hope readers will understand, the message I wanted to convey.