I will believe Diana who was there, and living that life. Thank you very much.
You can believe who you like, but Diana was an unreliable witness and 'The Crown' is fiction.
In any case, as I've already asked you, what really does it matter?
We know that Charles and Camilla cheated, as did both of their spouses (multiple times) and as was pretty much the norm among the upper classes of their generation. That doesn't make it OK, obviously, but if you were going to exclude adulterers from being monarchs or consorts, you'd have to exclude most of them.
So the fact that Camilla was, to use your expression, a 'homewrecker' isn't a reason for her not to be queen, just as it would not have been a reason for Diana not to be queen had she remained married to Charles.