In a lot of books about Kal Sarp yog people give example of Jawahar Lal Nehru and Sachin Tendulkar that even these people had kal sarp yog but they reached heights of success, where as fact is just the opposite.
People suffering with Kal Sarp dosh or Rahu malefic effects are very arrogant, and they actually have a tendency not to listen to any one’s suggestion and they can not hear any kind of criticism,People with Kal Sarp yog mostly take decisions which
later on prove to be harmful for their life.
Nehru was betrayed and cheated by a lot of people and later died due to unknown conditions.
At a lot of times his wrong decisions caused trouble specially if you people know that during China war he did not allowed Air Force to strike. Always trusted those who later betrayed him (very malefic kal sarp effect here), a wrong person put to power a lot of people faced the consequences.
Kal Sarp books and astrology books have written things out of context and just to fit the things which happened in past but they failed to analyse the facts completely because they(astrologers) never knew correct things as how history was modified and brought to world.
Same is case with Sachin Tendulkar , Sachin so he could never be a good captain for a good captain one needs to be a good decision maker. My observation has been that people suffering from this yog are unable to fully use their brain and more over such people are very arrogant and when some one tells them their mistakes they will shout at the person and will ignore the correct suggestion by others.
You might have come across many such friends of yours who would not be able to have common sense in a situation where even a child can take right decision.
Case in business like Dhiru Bhai Ambani is also same decision making in business is not a one man decision.So if Dhiru Bhai got success there must have been other supporting factors.
Mostly people with Kal Sarp should practice Yoga,pranayam daily, so that at a later stage in life they do not have kidney failures,diabetes,cancer and wear a Gomed (only if it suits),with an emerald to clear off the confusion.
Worship Bhairav and Durga in their life.This yog does not “necessarily” comes due to snake killings, there can be many sins from past lifes which are responsible for presence of this yog in a persons horoscope. But remember planets are bound by karmic laws they can not give you more punishment than you deserve so, changing destiny is definitely possible.For that you need to practise Kriya Yog and do Kundalini Jagran, roots of astrology lie in Kriya yog and Kundalini Jagran. Remedies of ancestors which you can find a lot on internet also helps.
If you can balance your kundalini then a lot of malefic things get nullified because planets affects the chakra’s in body and which in turn disturb the sthool sharir (physical body),we all have 3 body, one is the body which we see, the other 2 bodies only Yogi’s can see.
A problem which comes to you first appears in sookshm sharir and if you clean it there itself there by means of Kriya yog that problem will not come to physical body or life.Unfortunately Tantriks and Yogis of that high order who know all this are very few in number.
Malefic planets apart from disturbing the kundalini Chakra in backbone of your body affect decision making the kind of thoughts you will get will ultimately lead you to your failure.So if you want to get above all this practise Kriya Yog and do Kundalini Jagran along with meditation etc.
Yogic Sadhna’s are not easy and it can take 40-50 years and in most cases many births for Kundalini Jagran. If you really have that patience you can come out of karmic cycle, these things are awakened by Chanting Mantra, Stotra, etc and Bhakti also.
The presence of a yog in horsocope is just reflecting that his body is getting affected negatively by a few energies in atmosphere and how they are affecting it.It is possible to purify it with Yogic exercises/tantric sadhna’s which can clean your aura.
How ever some times Chanting the wrong mantra or stotra can cause problems also because kundalini (serpent power) within body rises and pierces your Chakra’s so a lot of pooja,worship etc might as well harm you.That was the reason we used to have Guru’s in old times who were capable of understanding all this. These days people do not know all this and the result is people keep doing remedies without even knowing if it is working or not.