Did you do any memory or CPU overclocking? Mine seems to run fun if I just select the XMP1 profile and don't touch anything else. Thing is, I'm losing ~ 10 FPS in Borderlands 3, for example. And benches are barely faster than my old 3900X, rather than the average ~20% expected boost.
Now we get to the meat and potatoes. The issues stem from overclocking. At which point any complaints made, while I personally consider as valid. I also react to with a surprised Pikachu.😁 Why? Silicon lottery for starters. Besides, didn't we just go through a whole fiasco over Asus not wanting to honor RMAs because XMP/EXPO is overclocking? LOL I know what you meant, but I had to.
And no, I am not really overclocking manually anymore. I.E. I don't squeeze every MHz out of my AM4 gear. I don't play with secondary or tertiary memory timings. None of that jazz. I set all of my Zen 3 to ECO mode with the 200MHz extra max boost. E.G. my 5800X boosts to 5050MHz when gaming. I have 4x8GB CL18 3600MT/s paired with it. The result is all of my benchmarks are better than stock; 3DMark, CPU-Z, in game benchmarks. On my 5700G I am running 4133MT/s ram without the 1to1 IF. Because the one thing I set manually, the iGPU speed, is overclocked 400-500 MHz depending on the case and cooling it has, and performs better with the added memory bandwidth.
I also do not play anything competitively, hence I use a frame cap with VRR for all games. Max is 120 if using my 165Hz monitor. That said, my 5600X with 4.85 boost, 1to1 3600MT/s spanks my old 3700X in gaming benches, so there is no comparison to Zen 2 with my setups.
My only complaint with Gigabyte is the UEFI. I liked MSI's implementation better when I had a B450 Tomahawk. The game mode A.I. thing was the future I was expecting 20yrs ago. Hit one button and it finds a sweet overclock for you with no time or effort. It set a 5600G to 4.7GHz all core but with power saving features active. I could still add a 4-500MHz iGPU OC on top of that. It's still running trouble free that way for my friend.That's as close to magic as I've seen on a board so far.
Concluding: I guess my position is, if your overclocking isn't going the way you want, I commiserate with youz guyz. Bummer my dudes, bummer.