I disagree; if anyone else who's thinking of releasing their birds sees this, and sees how many people strongly disagree with it, and why, they might do something more humane than dumping their domesticated birds into the wild to be picked off by predators. Like humanely killing them for food.
Do you have any idea what predators do with their prey? Some of them will start to eat their prey alive. Feral cats are especially bad about this, and about playing with prey items when they aren't hungry. Any of those quail that are caught by a predator are going to die a violent death, which is very unlikely to be as quick as a proper dispatching done by a human, and that additional suffering is on you.
Who was this meant to benefit? It's not a benefit to the birds, which are now going to have a much harder life and a much more violent death. It's not a benefit to you, who's now broken the law and messed with the local ecosystem. It's not a benefit to the ecosystem, which did not need and will not benefit from the introduction of domesticated genes. The ecosystem needs smart quail, raised properly, with no human contact. Not this. You know who you've benefited? The feral cats who just got lots of new bird toys. And they don't need anyone benefiting them! They're an invasive species!
What you've done is the equivalent of releasing domestic ducks into a pond and saying "hey, there used to be wild ducks here, this is good. Some of them aren't dead!" to justify yourself.
This was cruel, it was illegal, it was unnecessary by any and all sensible definitions, and it is made worse by the fact that you don't seem to grasp any of that.