Im done until the absurd 1 shot mechanics are addressed

I am breezing through a endgame map, with more than enough damage to complete a boss map. I get to a boss and miss 1 roll and BOOM one shot dead...literally you have to have perfect no damage run boss fights to win when it comes to physical attacks. This happened 2 times in a row...Im done until its addressed. I love the game but there is no value in that you expect players to deal with right now.