Nearly every single time I go or call an all in, I have the best hand, so I hardly ever give out bad beats on big bets / all ins, but I get them against me very frequently.
Poker isn't about this session or that session, or even if you lose with those hands multiple times in a row. Poker is for a lifetime and its just one big session. Even though it doesn't seem like it you will win way more money then you lose over time.