This topic has been beaten to death.
However, one misconception that Shias do have is that Sahabas cursed, hated, and opposed Ali r.a. out of their own evils is one of the most fabricated lies in the history of Islam.
The love and respect Sahabas had for Ali r.a is utterly incomparable to the muslims of today.
Well, the real misconception is that Sahaba who did curse, hate, and oppse Imam Ali (as) were loyal to the Prophet of Islam & his message. Read: Battle of Basorrah/Jamal, Battle of Siffein and who led first civil wars within Islam against the rule of Imam Ali and persistently disobeyed him.
The real Sahaba who loved the Prophet and his message, like Hazrat Abuzar Ghaffari, Ammar Yasir, and people like Maitham Tammar, Mohammad son of Abu Bakr, Malik Ashtar, may Allah reward them loved Imam Ali (as) and ended up sacrificing their lives for the household of the Prophet (saww).
The Holy Prophet (saww) said:
"Certainly, my Ahl al-Bayt will after me be unjustly tortured and murdered; and the most hateful of people towards us are Banu Umayyah, Banu Mughirah and Banu Makhzum."
Mustadrak, Vol. 4, p. 487
Al-Hakim declares it sahih.