I do enjoy OUaT but I agree with you. I didn't though have the initial problem with Henry lookng to Emma as his mother because to me it really had never seemed Regina valued him as a person and more as a prize, so I saw child devoid a loving parent figure trying to find one on his own.

However, the way the handled Cinderella gaveme som epause, and then there was somethign Hansel and Gretel but danged if I recall exactly. Time and time again though the show has IMHO harmfully devalued adoption as a responsible and good decision for some people, and has -as you said- repeatedly devalued adoptive parents.

So I like it, but that theme always gives me huge paused and makes my skin crawl.