To be fair, these issues with RX5000 are usually down to certain "problem SKUs", most AMD cards with mindfactory and others have RMA rates similar to their NVidia counterparts, then a few SKU's from certain brands will have like 10% RMA rates. Research on the drivers themselves haven't found any stand out problems in the past, though I haven't seen any further research on that since RX5000.
Still though, the thing AMD has been really missing these past 5 or so years is not an absolute top end smacker, it's a high end card that can maintain something loosely resembling a profit margin while still being price competitive. RDNA1 has already delivered them very healthy marketshare gains with only minor undercuts in the mid to low end markets, if they can step that up a little notch and do it across the board they'll be golden for now.