No honestly not, I've never had issues with any muslim. Although we were told to watch out for salafis and wahabis growing up haha
Did you have problems with the divinity of the Imams and the Ahlul Bayt? It seems so similar to the veneration the Catholics have for saints.
I thought Shi'as grow up told stories of Saqifah, how Abu Bakr and Omar stole the Caliphate from Ali, and didn't attend the Prophets funeral, battle of camel, battle of Siffin, Yazid and Mauwiyah, killing of Hussein, 'pen and paper' issue, fitna of Aisha, Hafsa, and the Sahabah etc etc Which naturally leads them to grow up having a deep hatred of Sunni's.
I'm not an Ex-Shi'a. But during my early years of Islamic studies, which included various sects of Islam, I did have a problem with the Imamate topic. If it was so important, and a major part of the Shi'a faith, why isn't it clearly mentioned in the Qu'ran to follow the 12 Imams?
I never understand why they say the Prophet's wives, Aisha and Hafsa, are not part of Ahlul Bayt? When the Qu'ran clearly says they are? Their argument of tahreef occured, which I find rather absurd. Overall, I found the whole sect of Shia'sm nonsense.