As someone who disliked the movie said previously, new Star Wars just isn’t for them anymore. I get the disappointment, I don’t get the anger.
5 Stages of Grief.
Shock. Anger. Bargaining. Depression. Acceptance.
They grieve over what they knew or thought Star Wars to be. That is to say, they don’t like RJ’s “certain point of view.” This new film casts a different light on the previous films, given context with them, and this then is a sort of cannot-unsee experience for them and they are having to cope with it.
They might be able to come to accept it. They might not. But they’re not there yet.
I liked TLJ, and so I don’t agree with their assessment. But I can understand it, and I don’t think telling them they’re fools for being angry is warranted. They’ll get over it. Just give them time.