Apple iPhone 12 Overheating, Sound Glitches, Pixelated Camera

My iPhone 12 purchase has resulted in nothing but frustration. Despite my careful and clean usage, I've had overheating, sound glitches, and a pixelated camera since day one. The phone frequently shuts down unexpectedly, experiences lags, and freezes. Contacting customer service only results in them denying that there are any problems. It's been a constant struggle since I got the device. Unfortunately, despite my efforts, the problems persist. The worst part is that when I contact customer service, they dismiss my concerns. At this point, I have no choice but to send the phone back for warranty service. The promising iPhone 12 has turned out to be a huge disappointment, raising concerns about its quality and the company's support.