Nobody likes bad beats, but face it, they will happen, so just grin and bear it. The opposite side of the coin is when fortune smiles on you, and you get, what for a better term is a 'good beat'.
It is a foible of human memory that you think the bad beats outnumber the good.
This is statistically inaccurate. Given a sufficiently large number of hands both will balance to be statistically even.
The same principle applies to a coin tossed in the air. It can come down heads or tails. Given a very large number of tosses, the outcome will not favor one side or the other, but balance each other out.