Why is it very difficult to have my apple id recognized?to

You’re sharing an Apple ID.

That sharing is not recommended, and does not work at all well, and is causing this mis-routing.

Each person needs their own Apple ID, and purchases can then be shared with Family Sharing.

Can you log into your Apple ID at the AppleID.Apple.Com website?

Are you getting a specific message, such as disabled, or disabled in iTunes and he app store?

If your Apple ID is locked or disabled - Apple Support

Your iPad is very old, and there will be issues finding and downloading apps still with support for iOS 9.