First of all, sunnis beliefs go by Quran and sunnah, not just sahih books.
As you said "according to your interuptation" that most sahabah were not rightues. Maybe. Allah knows best.
Does that give you right to curse them and juedge them?
Even if a verse says something like " "And they say: 'obedience'; but when they leave thee, some of them spend the night planning other than what they say to you. Allah records what they plan by night. Disregard them and put thy trust in Allah. Allah is Sufficient Trustee." (ch. 4, v. 81) "
The verse says "some of them spend the night planning other than what they say to you..." Does that mean, we should start judging and desecrate all of the sahabahs?
Shias curse every sahabah, ever compainion of the Prophet Mohammad, excluding Ali.
Allah is NOT refering to those "some of them" by name, we don't know who they were, its not good to judge. And its not good to desecrate all of the companions of the Prophet mohammad, based on your mis-understanding of quran.
Anyway, we believe that the Sahabah were not innocent of the minor or major sins, but their qualities and deeds were so virtuous and superior that they cause the pardon of the errors committed by them. We believe that if any of the Sahabah committed a mistake, he either repented or performed such virtuous deeds that they are either pardoned or will be interceded for by the Prophet as they are most deserving of his intercession. Their Jihad, Hijra, knowledge, deeds and support for the Prophet will be a cause of pardon of their few mistakes. As for their Ijtihad, they are rewarded twice when they were correct, and once when their exertion to find the truth resulted in a wrong conclusion.
Ash-Shafi'ee said, "I have allegiance for them and I seek Allah's forgiveness for them, and for the people of Camel and Siffeen, those who killed and those who were killed, and all the companions of the Prophet in entirety."
The deeds and virtues of the Sahabah, may Allah be pleased with them all, should be what every Muslim should strive to emulate to the best of one's ability. Their behaviour and sincerity were praised by Allah and His Messenger and that suffices as proof.
The Sahabah were undoubtedly the best in terms of understanding the religious obligations, the Sunnah of the Prophet and the way of establishing the Islamic teachings. Their belief is an example for us, as Allah says in the Qur'an:
"So if they believe in the like of that which you believe, they are rightly guided, but if they turn away, then they are only in opposition. So Allah will suffice you against them. And He is the All-Hearer, the All-Knower." [2:137]