Asrock phantom 4 unstable memory

Ouch, it sounds like you have been through the ringer. Please excuse me stating
the obvious here in my suggestions, I have to make sure the basics have been covered.

Are you installing the modules in slots A2 and B2?
Are you running XMP and have you tried testing with it disabled?
What are your full system specs including PSU brand and model?

As for QVL lists, I never rely on the ones on board product pages, they tend to
be only a small sampling and never get updated with new kits. I always use the
QVLs on the RAM product pages, as I notice you did with GSkill. Its challenging
for motherboard manufacturers to test every possible RAM kit out there but much
easier for a RAM manufacturer to test with a handful of boards from each manufacturer.
Generally, if RAM works on one ASRock (or other brand) XXX chipset based board
it will work on all of the boards from that manufacturer with that chipset.

I suspect the issue isn't the board (and not because this is the ASRock forum).
The fact that you have consistently had issues with so many different kits
suggests the issue lies elsewhere. Honestly, if I were you I would try to borrow
another Ryzen CPU to test with your setup. A bad/marginal IMC on the 3700x seems
a likely suspect given the information in your post.

Couldn't find the edit button :)

Yeah its been a horrible ride so far.
i know its not the most premium x570 board out there, sadly it was the only available at the time of purchase.