Asus have honestly been awful for me and wont touch them. More so support and trying to get anything that isn't working sorted. In fairness to AsRock when I have spoken to them they have been reasonably helpful and pretty quick to help where can. Sometimes it has just been no sorry can't do X but at least I got an answer in 48 hours and not 4-6 weeks like Asus seem to like doing.
I would go Gigabyte but their Bios screen been awful for donkey years and all the VRM stuff they have pulled previous which leaves MSI, no idea on them as haven't tried tbh but that may well be where I put my monies next.
The problem with boards is that everyone moans about all of them to some degree. With asus it's normally failure or returns, gigabyte the poor bios, msi the sometimes cheap parts with heavy marketing and asrock it's normally the bugs in bios or complexity of it all. Graphics cards are much easier to pick from as all it comes down to is cooler, warranty and returns. Even power delivery is less important now given the way boost works.
If you're on b450 and can drop in the upcoming 8 core with one bios flash and get within a few percent of x570, there's really nothing to moan about given the Intel options you've previously had upon upgrade. Flagship x470 I could understand the frustration more if things aren't so great.