Look if someone's having a bad time, it don't cost much to throw em a bone. Like sure, that last attack killed them a round early because everyone has had a moment to feel proud today but you. Or like the spellcaster who is feeling a bit shitty because every monster has saved against their spells by some fluke today.
Like if they aren't having fun, what am I doing here?
Video games do this shit all the time. Famously the first GoW gave new players a small boost in multiplayer. It led to a community and better engagement in the long run because people had more fun. BG3 has that goofy 'karmic dice' system, which is on by default. Fire emblem lies. etc etc
the problem with flubbing is the dishonesty and unilateralness. You can play a different system that doesn't create the situation your players don't like so easily.
Or honestly just import Fate points and "succeed at a cost" into dnd. The dice system still sucks but that would help tremendously.