My goodness, I hope that this is true.

Unless you're Luke Skywalkering me. Please don't Luke Skywalker me. The Last Jedi went exactly how we thought it would go. Basically, like Empire Strikes Back. Bad guys gain an upper hand, but the movie ends with a glimmer of hope as someone looks out into the stars. Of course, Rey wasn't necessarily genre savvy, so she didn't know that, and Luke's criticism was pretty valid in that context, just not necessarily when it's directed toward the audience via the trailer.