I think the courts made the best decision, the ‘birth mother’ gets custody, not the ‘donor’. Imagine if all egg donors could now claim custodial rights to children they had provided eggs for..........
But imagine if all surrogate mothers could claim custody of children they were carrying for biological parents?
The only true connection is the biological connection. And yes, that holds true even if you use a sperm donor and an egg donor — the child you bear can be yours emotionally, but not physically. The child bears the genes of the biological parents, and to the degree biology makes any difference, that is where the connection lies.
There is a reason that adopted children tend to seek out their biological parents, although we deny it because it doesn’t fit our modern culture — biology matters, we are connected to our biological parents in a way that is not fully understood.