AccJustForThat Update basically soft-bricked my device.
That's not what happened.
AccJustForThat Phone got low on Power over night and the insane 3min+ bootloop drains faster than it charges ....
When you see the notice that you're loading another OS, push the lock button to pause the boot process. Let the device charge for a while so it has enough battery.
AccJustForThat horrible Updates
The issue you're describing isn't about updates. It's that your device didn't have a full enough battery to do the update.
AccJustForThat no progression
Yes there is? Have you checked the release notes? There are improvements in every release.
AccJustForThat User Apps sucks ass
You can install other apps. The developers are working on improving them, but it takes time.
AccJustForThat Stuff Like 'Nightlight and extra Dimm' still has the Display issue after turning off. :/
These are known upstream bugs. Fixing them can take a lot of time and effort and maintaining those fixes would be even more effort. The bugs are easily worked around, but it's true they can be annoying for some people. I've found that toggling night light on and off can fix some of them.
AccJustForThat I don't like these kind of instability and uncertainty .
Updates that get to the stable channel are just that: stable. You're complaining here about something that is out of GrapheneOS's control, namely your device's battery charge level.