It's a big dumb fanfic. If you are willing to accept that, you might enjoy the pretty pictures and fights.
My memory is that FF7 was my favorite game of all time and I was so excited to see Square start to do more FF7 related content. After watching this movie I started to wonder if it was really such a great idea. I'm still not convinced, even with the Remake, that it was a good idea to make anything beyond the original PS1 game.