Serenity SUCKED! ...AND they killed off two of the main cast. Why do writers feel that heroes don't deserve a happy ending?!
Now you watch the characters in the main series and you know he just ends up spiked through the chest...
(As much as latter seasons of Mandalorian weren't the most exciting, just watching them kick back and relax was a great ending... they've earned to finally be a semblance of family)