We have seen many shias attacking some companions of prophet (sallalahu alaihi wa ala alihi wa sallam), due to they may be introduced something new into religion because of needs of society. No one from Muslims should see anything bad in sunnah of rightly guided caliphs. Because we were ordered to follow to their sunnah by prophet (sallalahu alaihi wa ala alihi wa sallam) in authentic hadith of Irbad ibn Sariyah (r.a). Other strange thing is, that shias are talking about bidah. Honestly seems to me that there is no such definition in their religion. They are doing a lot of things that couldn’t be traced back to prophet (sallalahu alaihi wa ala alihi wa sallam). For example their mention Ali in adhan, or they praying on tablets, or their matam and zanjir-zane and etc.
Anyway below you would see some eye-opening info.
Imam Abu al-Hasanat Abd al-Hai Lucknawi said:
“Ali ibn Abu Talib (r.a) in his period of caliphate introduced a second Id prayer to be performed in a Jami mosque, although the established Sunnah during the time of Prophet (sallalahu alaihi wa ala alihi wa sallam), Abu Bakr, Umar adn Uthman (may Allah be pleased with them), was the only one Jumua prayer was to be offered in in any one town. Similary only one Id prayer was performed in any town. In the time of Ali’s caliphate it was said to him that there are the weak and elderly within the town, and they are unable to attend the place of prayer. Ali therefore appointed someone to lead them in prayers in their local mosques”.
Quoted from “Iqamil Hujjah ‘Ala Anna Ikthar Fil ta’abud Laysa Bi Bid’at” (in english) by al-Lucknawi,
edited by AbdulFatah Abu Ghudda p 13.
So as it clear from this quote not only those companions that criticizing by shias, were involved in introducing something new to religion due to need of society.