Please don't start in-fighting bluebird. Being unified by a hatred isn't a bad thing. We all realise its a show, and express our opinions in a manner that does not hurt others. But being butthurt because someone doesn't like the same things you do shows a lack of regard for other people. Asking others to withhold negativity helps nothing.
While you may have had a very superficial relationship with the show, many people here have shared a visceral attachment since season 1, primarily to the Red John storyline.When so many people were/are disgusted by the way it ended, you cannot tell people to "get over it." The very essence of the show has been taken away this season. It's like the Mentalist was already cancelled.
While it can be claimed, getting over it shows a mark of character and loyalty, it is in complaining in which we truly express how much we once enjoyed the show. We still like some parts of every episode! Some parts we hate! But we watch in hope, we watch with patience, because we're loyal to the legacy of the brilliant seasons 1-5.
For us, if any single episode next season has 'Red' in the title, it will be a good season.