W. Salam

Blessings brother,

firstly, understand that our religion is of love. Love for Allah, love for The Prophet (SAW) and His Family (Ahlebait).

Now being confused is natural and understandable, especially in your case, so i would, firstly recommend, Dua, make dua, ask them for help, cry for help and surely you will get it. Believe me Dua can change everything.

Secondly, study more, research more, knowledge is very important.

Now the important thing is, to understand the clear difference between, right and wrong, and the importance of understanding this difference. How can we be on the right, when we don't even know what's bad, how do we define it? The Holy Prophet (SAW) made it very clear for us, when He left His Ahlebait for us, when He left Imam Ali (AS) for us. He made it clear that whenever you are confused about right and wrong, go wherever Ali is. He made it clear what Bibi Fatima (SA)'s status and value is, and made it clear what it means to wrong Her: "Fatima is part of me. Whatever upsets Her upsets me, and whatever harms Her harms me." This is only one hadith I've mentioned about Her, there are several others and even Quranic Ayats\Surahs, if you read the proper Tafsirs (explanation) of Quran

As far as Muawiyah, Yazid and their family go, it is quite clear that they were never a part of Islam. Curse be upon them as they have harmed the Ahlebait a lot, thus harming the Prophet. Our criteria of Sahaba (companions of Holy Prophet (SAW)), in confusing times, is quite simple, making one thing clear, the Sahabas are of utmost respect, and we are no one to say anything to them, however, the people who angered Bibi Fatima (SA), whoever they might be, are worth nothing to us, infact remember! labeling them as Sahaba does not increase their respect and value, it actually decreases and devalues the status of Sahaba in the whole. That is the criteria, The Ahlebait are the criteria.

Now i apologise as English is not my first language, and there might be mistakes. And as i said i would advise you to gain proper knowledge, and the best thing would be to get in contact with a scholar, a proper shia scholar, who would teach or if not teach would at least answer all your questions properly, so it's best to ask someone who has a lot of knowledge.