The Protestant heresies have nothing to do with the Trinity, that's the Orthodox.
The many Lutheran churches have corruption in them too, but when it comes to faith the core heresies in Lutheranism are Sola Scriptura, Sola Gratia and Sola Fide. You can be saved without faith, and faith won't really save you if you're evil and unrepentant. It's funny because scripture itself contradicts Sola Fide. See James 2:14-17 for example. Naturally, Luther disputed its validity because it didn't fit his views. He didn't like what scripture said so he cherrypicked it. It's a massive cope.
2 Cor. 5:10 makes it clear too.
That said, Lutherans and Anglicans while erroneous in many ways at least aren't on the level of their retarded children the Evangelicals or "non-denominationals". Heresy is the bread and butter of that brand of Protestantism. And you talk to their followers and it's amazing how brainwashed they are. Reason and doubting is condemned and they're fed a heap of thought-stopping cliches. Like, you ask them what kind of faith they have and they say "I'm just Christian" and pretend there's no difference between their faith and that of a Catholic or some other denomination. It's bullshit.>>21418
The laying of hands by apostles, for example. Or the part in one of Paul's epistles where he highlights the importance of upholding the traditions taught by the apostles.>>21422
Mormons are an example of using God's name in vain. Smith literally wrote a fanfic and said God gave him magic glasses to read the Bible and that's how he got his fanfic. They're usually good people but their faith is full of heresies that directly contradict the Bible itself. Like the body doctrine.
Coptics aren't one faith, they can be Catholic or Orthodox. I agree that the Eastern rites of the Catholic Church are way less subverted than the Vatican's Latin Rite. Vatican II did a number on the Church. It was a pastoral council but treated as a doctrinal one. It has induced to error and even heresy.