I do agree, they did kill off MY Star Wars. I honestly don't know where this will go, and I feel somewhat less vested in where it IS going after this movie.
Now, taking away my years of Star Wars fandom, and seeing it through an 11 yr old and 6 yr old's eyes, I thought the movie was great. They loved it. You get Finn, Rey, Kylo and Poe, each doing their own thing. The movie tells its own story, and has little throwbacks to the old movies, but it goes off it its own direction. It is just that, that direction is not the way I had it in my head it should go. Does it have a MacGuffin, and things that don't make sense to me? Yes. My kids didn't really care nor think that deeply about it. Also, they have never seen Battlestar Galactica, which this felt like at times.
I think Kylo says it best. Let the past die. Kill it.