Sometimes I can tell when my current DM fudges a roll to miss an attack or reduce damage. He has a tell in the specific way he pauses and breathes before announcing the roll, then tries to hurry to the next turn, which only seems to happen when someone is in a life-or-death scenario, but “luckily” survives.
Should I let him know he has a tell? Will it be less fun (or more stressful) for him if he knows I know?
Fudged dice ruin the mood for me. If I’m playing, I’m there to figure out how to make crazy things work in spite of the risks. If I can’t have that, I’d rather just read a book.
I don’t usually talk about it in the middle though - I believe arguments at the table should be reserved for serious conflicts (rudeness between players and so on), not personal preferences. This is more a reason I’d check out of a campaign gracefully, and it’s also one of a hundred reasons I really prefer to GM instead of play.