How do you NOT have to double delete meaaages

No way to avoid this. The "first" delete is a request. The "second" delete is a confirmation to make sure that you really do want to delete the message and you are not deleting it by mistake.

If you would like to see something different, you might want to suggest this to Apple. Click on the link below.

Feedback - iPhone - AppleApple › feedback › iphone

If you'd like, you can submit your request to Apple directly, using this link:--> Apple – Product Feedback - iPhone

Regards

Giulio