Sore losers absolutely complain. It's one of the biggest traits of being a sore loser. A mature person would be disappointed, vent to their close friends/spous

Sore losers absolutely complain. It's one of the biggest traits of being a sore loser. A mature person would be disappointed, vent to their close friends/spouse, and then shut up about it. They wouldn't publish a long blog post to air their grievances.