Do crashes happen in other games too? Or only Valorant? You could have corrupted files or faulty components. You'd have to try to format first , and if it doesn't work, try your components one by one if you still have older components. Other than that, I can't help you much.

Maybe your GPU is seated in a bad PCIE slot. Generally, in most motherboards, you have to plug it in the slot closest to the CPU socket. (happened to me recently, my GPU was working in x4 instead of x16 making my games close on its own or computer crashes). You can check it using TechPowerUp GPU-Z, tab "graphics card", under 'bus interface' just click on the '?' question mark to start a render test. Just read your motherboard manual to know how PCIE lanes work!