The reason you can sometimes see 100% displayed is that your technical percent chance to hit when you need only to "not roll a 1", and you have advantage, is over 99% (There are 400 possible results in an advantage roll, and only one of them results in amiss - that's a .25% chance of getting that one. This means you have a 99.75% chance to hit). It's not 100%; you *can* still roll that double natural 1... but the game's displayed percentage rounds to whole figures, and fails to properly communicate this. I'm not a fan of the percentage display - it feels misleading at times, and I think it's a partial contributor to people feeling and remembering their strings of misses more.
This. I completely agree that the percentage-based display and the critical miss pop up is partly the cause people feel more cheated by the outcome. Also im not sure if its visible enough how your attack chances build up before you attack. Im not a huge fan of the simpler display and would prefer at least the option to see enemy ACs and my hit modifiers upon clicking on the action and hovering over the target, also it would be nice to see possible damage/effect vs enemy resistance. Just to give more info to the player about the systems working in the background so they can plan ahead with their attacks more effectively. Just my 2 cents though
