I'm good at Mario Kart, but I am also extremely unlucky in MK8. With no exaggeration, the person in 2nd almost always gets triple reds and I have no means to defend against all 3. Most of the time I end up getting hit 2-4 times more before I can move again. Not only that, but the item system is unfair to me in general. I usually get single shells or coins in near last place. The only thing I can hope to do is frontrun the entire race. As for Smash, I am much better at it because the tournaments are usually 1vs1 and the battles take place on flat stages with no gimmicks or items. I do very well in skill based tournaments where no luck is involved. As for being well known it does make sense that I don't know a lot of people. Most people would just perform a quick trade and leave in Animal Crossing. You should try a tournament sometime. Playing others is the best way to improve in Smash or Mario Kart. You can learn new tactics with your characters or learn how to play against players.