After ESB you're left wandering will they get Han back, is Vader Luke's father, who is the other Yoda spoke of, will the Rebels win, about the Emperor etc.
After TLJ finished I had no idea what the next movie would be about, what questions they'd answer. I had no interest because I didn't know what direction they were even setting up. It was a difficult film to follow.
This is my feeling as well. I actually liked TLJ right after watching it, but upon further reflection it just left me feeling empty.