Why people keep mistaking with Disney?

Dont get me wrong i love disney but i´m sick of watching people saying EAH characters with disney characters.
It migth be surprising ,but Disney did not created fairy tales!
Briar being called daugther of Aurora instead of sleeping beauty,saying Meeshell Mermaid is Melody´s sister etc,etc,i just rolled eyes and moved but i lost it when Crystal being tagged in Tumbrl as "Elsa"
ELSA IS NOT EVEN A CHARACTER IN THE ORIGINAL SNOW QUEEN! she is a composite of the name tittle character and Kai,the boy.
Once upon a time is disney,Desendanst is disney,EAH is Mattel and Mattel is one company,disney is another one diferent .
I´m really the only one who notice this?