NO ONE READ THE OLD EU! The maximum penitration for the books are the Thrawn novels, which sold around 5 million copies a book to date. That includes all editions so we know a lot of the are collectors buying multiple copies as well, so let's say 3 million individual copies were sold. That's not a lot at all. So only 3 million people in the US know who Mara Jade is. Now a far greater number know that TFA is Star Wars, Rey is the extension of the franchise. This IS their Star Wars. You are taking it from them because you're a whiny fan, who is upset that their whole self worth just got taken away by an imaginary boogie mouse. You were the Star Wars person, you were the person your friends went to when they wanted to know what happened at the Battle of Tanaab now you don't know. It's a crisis of identity for you, you don't know who you are anymore so you're lashing out and blaiming a corporation for your woes.
I know we've discussed this via discord but I just want to clarify something for everyone reading this thread:
The Thrawn trilogy sold 5 million copies per book on average, but that also doesn't include any digital sales/audiobook sales/people who lent books to friends/people who bought copies from used bookstores/people who read the books from libraries etc. As hard as it is to guess how many, I'd personally suspect it's far above 3 mil
Legends fans also aren't trying to "take away" the new universe; all most of us are trying to do is have the Legends storyline co-exist with Canon and have all the stories that weren't finished continued; Ben Skywalker, Vestara Khai, Jaden Korr and the Sith Clones, Allana Solo, etc.