I'm beginning to question the IMDb Ratings system

Rating: 5/10 (3 January 2017)

There have been many many really great movies over the decades. This includes all categories from action and adventure to romance comedy and musicals etc. For many years my wife and I have used the review rating system here on IMDb to help us make an informed decision about what movies to see and which ones to avoid. The last two movies, including La La Land, had ridiculously high ratings. Ratings that exceed some of the greatest movies of all time.
While we didn't hate La La Land it certainly doesn't merit a score of 8.9! I'm a romantic at heart so I didn't walk out of the theater and I endured the slow parts. In the end I was okay with the film but walked away disappointed because it didn't deliver on what I expect from such a overall highly rated review. Recently a famous retail online website (named after a famous rain forest in South America) started filing lawsuits for a recent flood of false / fake and misleading reviews that make the product appear better than it is. I can't help but wonder if the same problem (i.e. hacks) is now infiltrating IMDb. I certainly hope not.
NET: If you like musicals, just reset your level of expectations to average. Don't expect to see anything great. My time in the theater was pleasant and relaxing... I enjoyed the popcorn and the quiet time with my wife but we both agreed it failed to live up to the high ratings found here on IMDb.