You did not say you had used DRAM Calc in your initial complaint. I don't work for AMD, no one here does, well a few and they are clearly marked "staff". The rest of us do this for free in our spare time.
If you want someone to say that your CPU is defective, this is the wrong place. We can't issue an RMA, even staff can't. You need to go through regular AMD support for that.
That said, there's a new BIOS out for your board as of this past weekend. Try it. Recheck your RAM and FCLK settings because everything you complain about relates to an issue with something there. Run TM5 or HCi memory tests and see if you have errors. It's not the first time a stick goes bad.
Typically heat, RAM settings, FCLK too high cause this issue. If FCLK is set to "auto" it may be creeping over the 1:1 ratio, which for RAM at 3600 is 1800. Your RAM goes to 4000 meaning the FCLK could go to 2000, way over what a 3000 can do. Some can't even do 1866 or 1900. So hard setting that value might help. SOC too low or not set to a solid number like 1.10-1.15v can cause instability.
There's no "book" of answers here. You are the builder/user, you are in total control of how the diagnostics go or don't go. If you're unwilling to try a flow chart of tests, even if it sounds like a waste of time, then you find out nothing.
I had a 3600x running for months at 3733/1866 and one day a flood of WHEA 18, crashing ,rebooting, games crashing. Well it turned out with the current BIOS, I wasn't stable suddenly. I backed down to 3600/1800 and it all went away. 3 months later a new BIOS came out and I tried it again, this time I was stable at 3733/1866 because this update allowed for the 3000 series to go as high as 1900 FCLK. You can understand now, maybe, how things can run perfectly and just go to crap in a day?
FYI, ignore the Kernel Power 41's, that's due to an improper shutdown. The WHEA 18 is the reason. 19 won't cause a BSOD usually, but to high of an FCLK might. It's generally a PITA to have RAM rated higher than what you need and then down clock, because sometimes the higher speed RAM isn't binned as well as a lower speed like say 3200-3600 is binned. Thaiphoon is a good one to use to find out what binning you have and what other speeds/settings your RAM supports via JDEC. It's how I found that my Team 3733 was actually 4000 in 2017 and those settings work but my FCLK tosses WHEA 19's if I go there. So I backed off to 3933/1966.
It's a dance and seemingly never ending game to get an AMD anything stable. I'm stable now but in 10 minutes maybe not. In which case, I'm not going to get "screaming mad" and toss the PC through a wall. I'd take a deep breath and start the same tests that got me stable in first place to find out what went sideways or if I need to try a lower setting or replace the RAM, whatever. It's electronic, stuff fails.
"It worked before you broke it!"
