Killoffpoe has a point, but it’s more against TFA than TLJ. TLJ was the best movie possible from the setup TFA gave us. I also didn’t like how we simply went back to the point where we were at the beginning of Star Wars without any real explanation.
I think Episode VII should’ve been the story told in the flashbacks + the New Republic being set up + the First Order rising silently
TFA should’ve been Episode VIII
TLJ Episode IX

Because, as a lot of people said, it really works just fine as a finale.