I would like to turn off the two-factor authentication

If you have 2FA set up properly, it should be quite unobtrusive. If I have to enter a code more than a couple of times in a month (across four devices) that's a lot.

Review this article, especially the section on managing your trusted devices:

Two-factor authentication for Apple ID - Apple Support

If it has been enabled for more than two weeks, two-factor authentication cannot be turned off.

No

Why would you like to make your Apple ID less secure?

What issues are you facing by having 2FA enabled?

Genuinely, I'm just curious and would like to know your reason(s).