[astroglide]

you should call with aces if every player at the table goes all-in preflop. i think you're probably seeing that a win rate of 50% or less is sub-optimal, because you lose more than you win. that is not the chief consideration.

let's say you have 2 opponents, so 3 players total. if you win 34% of the time you will show a profit if everyone goes all in preflop. you each put in equal amounts of money, so that's 33.33% of the pot. if you take out more than 33.33% of the pot over time, you have profit.