So you apparently spoiled her and didn't raise her properly. You didn't want her to be mad so you didn't enforce any rules. Then eventually she left you, because you were apparently a shitty mom and didn't even love her, since you are not even sad that she is gone.

Just like the other commenters I'm very curious about her side of the story. She might have just became a bratty girl, because of you spoiling her, but you might have also not been as great as you think you were. Wow, you spend money on your child, you want a medal? Maybe you were controlling or fought with her about small things and made her miserable. Idk, but usually kids don't just go NC for no reason.