The Bible says,"Be grateful for such as you have".But it seems to be a natural reaction of most in the fallen nature,that when they don't "get their way", they react badly,and I can show some examples.Like I notice {especially one of my customers}when she tries to book something with me, but I'm booked at that time, she makes little sarcastic quips to me.{Well tough, the world doesn't revolve around her.}Secondly, I and I'm sure you have seen, when either men or women get rejected ,the "sour grapes" start--the person who they formerly put on a pedestal. now, to sooth their bruised ego, they all of sudden start "bad mouthing" the person,{but only after getting rejected.}But when you "put yourself out there" you could win or lose.You know that when you do it.And then,when the term "sore loser" is used, the longest running tantrum I've seen, when the Democrats thought they had the election in the palm of their hand,and Trump won,and ever since, we've heard all this hostility, accusations, impeachment pleas,etc.Again, you expect this from 3 year olds who don't get their way, but these adults throwing these tantrums. So now, the question is,is being a sore loser a sin?I would think it might fall under the category of rebelling against"be content with such as you have."Also, I think it arises from the fallen nature. The flesh wants its way. Can you picture a Christian "flipping out" if someone didn't agree to their request,,etc.Is being a sore loser a sin?