Hi. It is indeed more than infuriating not to be able to play a game that was next on the menu.
For the sake of pointing a possible way forward, I have something to say about the "only this game crashes" topic. Well, I will mention only the last time it happened to me. Sometime this autumn, my PC started shutting down during gameplay, and it was limited to a single game... Rainbow Six Siege. Other games, like Cyberpunk 2077, Fortnite, Fallout 4, etc. as well as 3DMark benchmarks, all worked flawlessly.
It was too easy to blame the game. But what happened? I started monitoring and troubleshooting my hardware on that single game where things were crashing. And nothing worked. By then, I've taken out the TB/utility card, sound card, swapped peripherals, checked power connectors on the GPU and CPU side, tried WiFi instead of LAN and whatnot. What gives? Well. Then I started suspecting the PSU. And you wouldn't believe what I found. Instead of a broken PSU (an AX1600i), I found that half of the ATX cable got plugged out, dear goodness knows how that happened. When that was plugged back in, all returned to normal and I was able to play flawlessly again.
But only one game was crashing.
AMD is known for DRAM quirks, and I recall that unstable DRAM settings were a problem for me, specifically in Cyberpunk 2077 (and nowhere else). If DRAM couldn't keep up with its own steps, the game would eventually crash. Maybe that is the place to look in your case, too.
P.S. Tinkering with hardware? Shut the PC down, and unplug the PSU, hold the power button for 5 seconds [after the last light drains out, if that turns them back on]. I once worked on a running PC to unscrew something, and that screw caught a fan header and fried the mobo and the CPU. That was some 800+ euros damage right there. One screw. The real danger of it is that it could also start fire and burn down homes.