Why aren't people using DDU to clean install their drivers?
When I used RX 580 and Vega 56, I haven't had any of those issues even upgrading the drivers to latest version was relatively painless.
The only problem I encountered with Vega 56 was that my system would wake up from sleep mode by displaying Static noise on the display which could only be remedied with an OS restart (and this issue started appearing on drivers after version 19.5.2 - but nothing in regards to flickering, black screens, pink or green screens, or driver crashes - and the static noise on display is relatively easily remedied by using Hybernate as opposed to sleep, though I'd prefer AMD fixed that problem).
With major changes to drivers, yes, you'd be expected to use DDU to clean up any residuals from before (as there are too many changes in between drivers to expect a 'clean transition') and do a clean install of latest drivers instead.
Its standard practice.
If you had an NV gpu in your PC and then decided to change for AMD, how the freaking heck do you expect your GPU to function if you have REMNANTS in your OS from the previous GPU you used?
Those are NOTORIOUS for causing problems and people were recommending clean driver installs (and removing remnants of old drivers) before installing a new GPU in your system.
Not saying that AMD doesn't have driver problems, but I also do think people are exacerbating this issue with their own lack of competence by not using any logic or reason for that matter.
People ARE using DDU, and are still having problems, because AMD's drivers are bullshit. I say this as a long time AMD GPU user, their driver installer/uninstaller is a mess. The nvidia cards I had in the past, and currently have in my laptop? Work flawlessly, no need to use safe mode of DDU or any other tools, they Just Work (tm). I've even gone so far as to test this by removing the drive from my AMD PC and putting it into my intel/nvidia PC. Windows 10 successfully installed the new drivers and everything worked fine. Try it the other way, get ready for the pain train; next stop, your derriere.
ATi's drivers were always a mess, and AMD apparently never purged the team of their old employees. AMD's GPU drivers have been a mess for 15 years now, with the only exception begin the fluke that was polaris/vega, whose drivers were relatively stable. Until Navi came out, that is, and the whole thing went to pot. Again.
Their drivers were a mess with the HD2000 series, the HD 3000, the HD 4000, the HD 5000, the HD 6000 (and thats why fermi sold so well despite AMD's massive hardware advantage and low price), the HD 7000, the RX 200, the RX 300, ALL had junk drivers with major performance issues, black screen and hardware acceleration issues, ece. Dont forget old bugs like OpenGL performance in general, 16 bit open GL being broken from 13.7 to somewhere in the 18.xx line, freesync issues of all kinds recently, the aggressive down-clocking making old games unplayable that AMD refused to acknowledge was an issue for 8 months, and black screen issues galore, especially in multi monitor situations.
MY HD 2600xt was great, when it worked. Installing the drivers for the AGP version in XP was a royal pain, since they could only be installed on XP SP2 for the longest time. My 9800 pro was great, except for the driver trying to load the PCI INF instead of the AGP INF every time you booted. The 480 was a fantastic card for its entire run, My HD 6650m was great when the drivers would let it work and AMD wasnt breaking the switchable graphics, and I love my vega 64, but the 20.xx series drivers have made it an unstable mess. My next card, no question, will be a Nvidia card. When I had my 550ti SLI setup, and my 770 SLI setup, outside of the infamous chrome crash issue that nvidia sat on, there wasnt a single noticeable issue despite multiple motherboard/CPU combos, dirty driver installs, and OS drives being moved without re-installations. AMD has once again fallen asleep at the wheel of driver support, and it will crater their attempts at regaining trust from the market, just like the last 15 years.