Alright, I figure it's about time i state my opinion on this subject instead of messing with Hylain <3
Samus is nowhere near "bad" she is just not meta knight.
She has all the tools required too build damage, survive, and pressure. the only thing she lacks is reall just unpunishable killing moves(MK d-smash, snake u-tilt) although Z-air is next to unpunishable and it -can- kill.
Through my experience, even against great players. i have been able to go toe-to-toe with Wobbles(MK-55%ish win rate, his favor. we played a bunch), DSF(snake-3-2 his favor, friendlies at AZone2) and Forward(50-50) just to name a few. Now, if Samus is truly terrible, there would have been no way I could have been rivaling these players. unless i was exponentioly better than they were(which i don't think i am)
Samus is a very difficult character just pick up and play, unlike mk(up-b>glideattack>upbglideattack lol) and because of this, the people that play Samus are either
1: They are bad at the game and play Samus for fun, which is fine. but when they lose they complain about how she sucks instead of the fact that the player is the one who sucks.
2: People who have messed around a bit with Samus, know how to fight somewhat well, possibly are trying to emulate a better Samus player. usually can win against friends. but never win in tournaments. these are the players who usualy claim Samus is amazing. mostly because they watch highlight-video's like TOOL.
3: The people who actually have mained Samus since day 1(or earlier, melee, 64) and are sticking through the "samus sucks" prediciment. these are the great Samus main's who know she isn't the best character in the game. but can hold her own against the better characters if the player is good enough with Samus. Myself, Tudor, Rohins and Xyro fall into this category.
Is samus amazing? no. is she bad? also no. while the fact that she isn't comperable to MK who kills at 90% with 4 of his nigh-unpunishable attacks. nor is she snake who can kill at 90% with 2 attacks that come out insanely fast. However, once people learn the nuances, tricks and setups. Samus has potential to hold her own against any character in the game, as long as the player who is using her is good enough.