Variance.

variance exists and that all. you can search any tools, do any math, variance is variance and it always be in our life no matter what you do. but good players ( not me) will tell you this:

a bad player will always be losing w/ or w/o variance

a good players will always be winning w/ or w/o variance

this is the only conclusion you can have... you cant blaim variance, math, luck, badluck, fishes or anything else for your losing in the long run... it's your own fault... its true you can have a long bad run, but even then, review your hands and you will see that 50% of your losses are due to bad play.

so stop doing this shitty math to say : " oh, i am losing cause variance"...
fck that.. use the time to study and learn and review hands and see what you did wrong and it will help you more into becoming a winning player then doing this variance math .

pre flop AI AA will always lose ~20% of time to any PP and even gonna lose ~11% of time to 72o... and there's nothing you can do about it/// but you can do a lot to improve your game

P.S.: every "you" is general, not referrence to a certain person