2 words my friend
"Blame Sakurai"
as what people would probably say =/
I may have fonud a method to counter ganging up types tbh, I reckon you have a better chance in the air to deal damage than being on the ground, since if they accumulate at the bottom, chances are that they'll hit each other instead, being in the air you can Dair, Bair, Fair through a direction of your choice, while they can pretty mcuh only do Usmash, or if they are clever enough to attack you back, but you have the aerial advantage at that point so you could always spike em back down.
EDIT: I may make a thread on training methods, I'm suing the search tool so I won't get shouted at by the mods
(Currently I'm testing a method to restrict myself using a certain move, e.g. Samus Neutral B to make myself a bit more on the offensive type.)
EDIT2: The Thread will be released tomorrow, I lied, maybe later when I complete it.