The ending was perfect it shows how ted met his childrens mother and not Further.
The character development was perfect the way barney finally settled down was good and not the way you thought it would be.
Marshall and Lilly finally found an answer to their big question on how to live a parenting life with friends in it.
I think people are wrong about it being disappointing because they wanted the happy ending with barney and robin being together.
But the show has a great message about how life never turns out as you think it will and that's why they let tracy die.
Love is not something you just turn off and that's why the series started with Robin and ted dating and after all those years they finally got each other.
it was a happy ending and i think it was the right one