That's not what phones were meant to do or be designed for.My 7 is doing the same thing my 6s did. Bending. I believe the bending is caused by putting it in and taking it out of the case. I use a Siedio Convert case. Unfortunately, the phone is a real pain to remove/install from that case, BUT, it does provide the protection I need from drops and what not.
Additionally, it's not the phone being a pain to remove/install; it's the case.