Help! My New PC Build Keeps Rebooting Instead of Booting into Windows

I recently built my first PC, and it was working great for about two weeks. Then, it started freezing occasionally and eventually shut down completely. Now, it's stuck in a loop where it keeps rebooting. It gets to the BIOS screen but never actually boots into Windows 11.

Here are my specs: Ryzen 7 5700, MSI B550M Pro VDH WiFi motherboard, 2x16GB DDR4 RAM at 3200MHz, ASUS Dual 5060 GPU, and a CX750M power supply.

I've spent over 50 really frustrating hours trying various solutions. I've tested both RAM sticks in all slots, reseated everything that wasn't stuck, bought a brand new NVMe SSD, and updated to the latest BIOS. When I boot up, it shows the motherboard logo and attempts to load Windows, but before it completes, it turns off or sometimes shows a recovery screen. Then it automatically reboots, and the screen blinks a few times before shutting off again. I've even reinstalled Windows 11 about six times. Any suggestions would be greatly appreciated!