In my final years of school, my best friend was a lot younger than me (by about 6 or 7 years I think?) and I introduced him to Smash Ultimate. He picked up the mechanics quicky and we soon got on equal footing, that being said, he was a sore loser and very spammy. I may have ignited the flames of him being a sore loser by playing as ridiculous Miis and choosing Mr. G&W every time he played as Ness.