Eliminated a player turn 5 in b3. They all say im in the wrong, I disagree.

Im playing [Minwu, White mage] he puts a +1+1 counter on all my clerics whenever i gain life, it snow balls, my creatures get big fast. I was player 2. Player 1 was playing monobgreen moleman and had a mossborn hydra that was going to be big enough to 1 shot me on his next turn. Player 1 also had an instant speed removal spell that he cast at sorcery speed to draw a card at the end of his turn instead of saving it to see if he needed to use it as removal or not.. , goes to my turn, i top deck an angel of destiny, im at 60 life, i move my grieves onto it for haste and swing at player 1 to take him out, he goes silent and the rest of the players start going on about how im not allowed to kill a player before turn 6, i point out the bracket says thats an expectation, not a rule and theres also the expectation for players to run some interaction but they wouldnt hear it, were still on the declare attackers, i offer to judt not swing the angel, player one scooped while we were still talking. Then player 3 kills me on his turn also turn 5, and ends up winning on turn 6. I dont see the issue with me eliminating a player that is going to eliminate me on the following turn, especially if no one has ran any interaction all game.