If it's John Wick. Let it end in a John Wick – another one. Maybe less 'dogs biting people in the dick' but overall, the ending is ok. That's ok, but we're all a little upset about everyone wanting to change the ending of every other TV show. Guys, sometimes, it is what it is. Just accept it and move on. 

Unless... it's the new MacOS. Start a petition now. This shit needs to change. 

If it's Endgame.. spoil the ending, then change it.

... And if it's anything else that will affect the rest of your life – keep trying. It's never too late. Change the ending. xoxo