Salty losers?

How do you deal with salty losers? Now that I'm attending more cups. I've come across some salty people recently. Idk if its cause I'm newer to the scene in my area and they don't recognize me and don't think ill perform well. But these people just look so butt hurt that I played well and won. Did a cup yesterday and ended up getting 2nd. The guy I beat in top 4 was just so salty and even went through my discard and was trying to say I discarded a switch cart during my first turn so I shouldn't have had 2 lol. And gave me a “hmmmm weird” when I said no lol. Played raging bolt. Had more fun than my opponents.