How common it is for the shi'as to curse the sahaba of the Prophet Muhammad PBUH i.e Abu Bakr, Umar, A'isha etc?

I have seen many shi'as online cursing the sahaba of the Prophet Muhammad PBUH, many shi'as I have seen called them mushriqeen, many I have seen chanting bar Umar lanat beshumar in their ceremonies (sometimes Umar's name is replaced with Abu Bakr and the likes), I have seen them ritualistically chanting curses to the sahaba including by children. I have seen some of their religious leader say that anyone who does not curse them cannot be a shi'a. These make me believe that it is fairly common for the average layman shi'a to curse the sahaba and also because I haven't seen the contrary, of them praising the said sahaba. So I would like to ask if there are any info on how common ritualistic cursing of the sahaba is among them. PS: For anyone saying that the shi'as don't, I have many evidence backing my opinion. They do curse the sahaba. There is no doubt about it.