I don't have any experience with AOC monitors, and I'm not sure if this will help much, but I recently upgraded to a new MSI monitor and I'm extremely impressed with the build quality and the overall experience with the monitor.
I was between a Samsung Odyssey G9 or an MSI 491CQPX. After hearing many of the horror stories about the Samsung quality issues, I decided to go with the MSI which has the exact same panel. Man, am I glad that I did. This monitor is amazing. While this is a high-end monitor from MSI, it's led me to believe that MSI probably has good build quality across the board.