Having a queer character believe he won't find love and proving him right is not good writing.
Having a character grow up in solitary confinement and then ripping her away from the only family she's ever known to live a life of solitude once again is not good writing.
Having a character be in love with his best friend and then just compare it to a high school crush is not good writing.
Having Eleven say that Mike has always been the person who truly understood her after showing us in the previous seasons that he only sees her as a superhero IS NOT GOOD WRITING.
Having two girls be abused by a man with power for the majority of their lives only to leave them dead and alone as a direct consequence of the trauma they suffered IS VILE WRITING