I didn't claim otherwise. Qur'an comes before anything else, and our Prophet (pbuh) tought us how to apply the rulings of Allah (swt).
Brother, that's why we have Saheeh Hadiths.
Saheeh Hadith's contains that: Each reporter should be trustworthy in his religion; he should be known to be truthful in his narrating, to understand what he narrates, to know how a different expression can alter the meaning, and report the wording of the hadith verbatim, not only its meaning. This is because if he does not know how a different expression can change the whole meaning, he will not know if he has changed what is lawful into what is prohibited. Hence, if he reports the hadith according to its wording, no change of meaning will be found at all. Moreover, he should be a good memoriser if he happens to report from his memory, or a good preserver of his writings if he happens to report from them. He should agree with the narrations of the huffaz (leading authorities in hadith), if he reports something which they do also. He should not be a Mudallis, who narrates from someone he met something he did not hear, nor should he report from the Prophet (may Allah bless him and grant him peace) contrary to what reliable sources have reported from him. In addition, the one who is above him (in the isnad) should be of the same quality, [and so on,] until the hadith goes back uninterrupted to the Prophet (may Allah bless him and grant him peace) or any authority below him.
These criterias prevents uncertainties of the hadith being true or false. Hence Saheeh (Turkish: Sahih, yani gercek).
Also, Ibn al-Salah, however, defines a Sahih hadith more precisely by saying:
"A Sahih hadith is the one which has a continuous isnad, made up of reporters of trustworthy memory from similar authorities, and which is found to be free from any irregularities (i.e. in the text) or defects (i.e. in the isnad)."