Delete apps that are store on your Apple account

I don't know why Apple doesn't have a way to do that. Resetting your phone doesn't affect your purchases history.

Apple doesn’t routinely monitor the discussions. These are mostly user to user discussions.

If you want to, you can send Apple feedback. They won't answer, but at least will know there is a problem or a suggestion for change. If enough people send feedback, it may get the problem/suggested change solved sooner. Pick the closest topic you can find.

Click here to send Feedback   -

You can't delete apps from your Purchases History. The best you can do is hide the purchase.

Purchases - Hiding/Unhiding.