Problem iphone 14 pro max

Hello, I have purchased the iPhone 14 pro max and it has some problems with the iPhone, oh it is very slow in using the phone, there is a problem with the front sensor when I use it for a phone call or voice recording in the WhatsApp application, it does not turn off the screen and sends and logs in to different applications There is a large drain on battery power, there is a defect in the always on display, it does not work well, sometimes it works, sometimes it does not work, and sometimes I encounter a defect in its work, as it works and the phone works, I do not know how this happens, and there is a defect in the use of the camera on social applications, as it vibrates We want a solution to all these problems, please