Part of the reason humans are bad at statistics is because actual probabilities feel wrong to us.
For example, one of the laws of unlikely events (events less than 50% likely to occur) that holds true but feels wrong?
You will get a below average incidence rate more often than you will get an above average incidence rate. So, you will watch, and most of your results will be average or below average. Assuming average luck, there will be enough above average rolls to approximately balance it out over a sufficiently large sample size, but below average is the norm.
Some games cheat to make the odds "feel" right. They will lie about odds, artificially normalize odds based on prior results (which is to say a miss makes the next roll more likely to hit), roll twice and skew in a direction, and other tricks to make the numbers feel like the human brain incorrectly thinks numbers should work.
By every indication, Galaxy of Heroes does not do this, and instead does a single fair die roll that is the same for every toon.