Network card junk?

Hello, I built a PC a few months ago and yesterday when I was playing Ghost of Tsushima my keyboard kept turning on and off out of nowhere, then my FPS dropped until the game froze (the sound) and I just had a black screen, nothing I could do. I then pressed the reset button but after rebooting a few routers disappeared from the WiFi selection and the ones that are displayed always only have one bar and I can't connect. I also can't connect to a mobile hotspot right next to the PC. I've reinstalled the drivers, reset network profiles and tried Linux, exactly the same thing. Someone also told me that the thing had burned out. In that case, can I get a replacement MB from MSI or Mindfactory?

PS: It is the built-in network card from the MSI B650 Gaming Plus WiFi motherboard.

And I think the crash is because I recently turned on CPU boost in the BIOS.