The divisive official ending of How I Met Your Mother created several problems for the finale, but the released alternate ending could fix them. After nine seasons of looking through New York for his future wife, Ted Mosby finally found the titular mother in How I Met Your Mother's final episode. However, the finale's plot twist retrospectively changed the focus of the entire series, but it was a choice that many were disappointed by. The alternate ending, on the other hand, gave audiences a much happier conclusion.

https://screenrant.com/how-i-met-your-mother-alternate-ending-better-reasons/