Bbc's merlin having a horribly sad ending? Everybody dying except for Merlin, who is condemned to a live of eternal loneliness? What are you talking about?
As far as I'm concerned Merlin showed Morgana how to use her Magic, she and Gwen got married, adopted Mordred and returned magic to camelot, Merlin and Arthur live on a farm like Arthur wanted, they have adopted Aithusa, all the knights are a big happy family-