Firstly, the mother has been dead all this time. From the first episode where the audience is introduced to Ted Mosby and how he will be narrating the story of how he met his wife, and his kids’ mother to his kids (and therefore the audience), the main object of ‘How I Met Your Mother’ always deemed the identity of the mother as crucial. Since the past nine seasons, Ted is actually narrating the story after it has been six years since the mother passed away. Another shocking and unexpected detail to the story was that Ted’s much awaited soul-mate was not his deceased wife. Rather, the same woman whom Ted was developing a likeness for in the first episode was his actual soul-mate. Yes, it was guessed right; Robin Scherbatsky was Ted’s soul-mate all along.
After the confession regarding the mother’s identity is made, the finale of How I Met Your Mother goes on to the kids questioning their dad, claiming that they don’t buy his story. Ted’s daughter argues that this cannot be why they were made to listen to the story and instead urges her father to accept that he is in love with Aunt Robin. Ted does not retaliate when confronted with this and suggests that he call up Robin and ask her on date. How I Met Your Mother ends with Ted meeting Robin and suggesting that they lived happily ever after. So the mother on whom the entire show was based was never supposed to entail significance in the show.
The reaction of the fans has somewhat been mixed, while some are angry at the way the show ends and believe to have wasted their time watching 9 seasons of How I Met Your Mother, others always wanted Ted and Robin together and are content that that is how the show ends. Regardless of the difference in response regarding How I Met Your Mother’s season finale one thing is certain: it was one unexpected way to end the show.
Source: Washington Post