@stepupandbecounted
Have a fun breakfast and a safe journey back.
Your 'friend' has lots of thinking to do after this holiday.
On the upside you now have new friends Frangi!
But the main takeaway from everything the OP has posted is that the friend won't be doing any thinking at all. Because in her mind, OP and her daughter are the unreasonable ones.
Why is everyone in such a rush to diagnose some sort of special need? We are friends with several families who have children with an additional need and they have to be shit hot parents with consistency and setting boundaries. Not every wee shite of a child has special needs. Some are just wee shites whose parents are hopeless.
Seems fairly clear that the OP's friend doesn't see an issue with Alyssa encroaching on adult time, always having to win and bossing all the other kids around. And because she sees no issue with it, she's not going to attempt to change. Or perhaps she does know deep down that she is a shit parent, that her kids tantrum and get their own way, and she doesn't want to go through the pain of addressing that behaviour.
I wouldn't be able to continue the friendship I don't think, which is sad for OP.