NO-IDea
Smash Lord
First and foremost, specials after jabs don't work. (Exception is jabbing someone in the air, followed up by up+b. Up+b has a huge hitbox on aerial opponents.) All other specials take too long.How do I use jab to do anything besides get shieldgrabbed? Everything I try to cancel into will get shielded (even jab2, what the **** is that **** how can you have a jab combo that can be ****ing shielded after the first hit?? **** you sakurai), and jab > grab only works here and there and leaves me bent over with my pants down when it doesn't. Random stuff like jab > retreating down-B doesn't really get me anywhere, either, although it is kinda fun.
Secondly, I don't understand what you're doing that up close with Samus. She can't kill. To make an example, she's not Peach where she can't kill until high percentages. Because Peach has a plethora of easy to land kill moves. No, Samus just can't kill period. Therefore, you should be trying to poke damage rather than playing it up close. Play like the French Defense in chess: buckle up and wear him out. It's not initiative you need; you need to wait until they give you an opportunity to explode with one of Samus's combos that normally rack up like ****ing 30-40%. If you try to force it, you'll play like other Samus mains who are exchanging damage, and it looks like the match is even to the untrained eye. But to the trained eye, it's as bad as being on the same percentage against a Snake. They will kill you way before you kill them. And if you lose the stock advantage with Samus, it's such a steep hill to climb in order to win the match.
If you don't like playing a defensive character like Samus, drop her. If you're the type to run in aggressively, then Samus is not the competitive character for you. If you are the patient type, willing to wait out, then punish and crush your opponent for their incompetence, then Samus certainly is comparable to what you want. What I certainly hate is when people tend to compare Samus to Marth. Clearly they lack understanding. Samus spacing is different from Marth spacing... she's retreating while Marth pressures all day.
Now then, jab cancel options if you do find yourself in that situation (**** happens):
Jab 1-> Jab 2: Beats spot dodges. Is actually decent, the second hit doing 7%, just as much as f-tilt... and comes out faster than jab canceling into an f-tilt. You can vary timing as well. Lacks shield stun.
Jab 1-> D-tilt: Fast, high damage. To be used on occasion, both because it's easily punishable and it stales one of your best kill moves.
Jab 1-> F-tilt: Decent damage, does just as much as a jab combo. To be avoided, since jab combo does the same damage but comes out faster. Good roll punisher though, (cancel jab, f-tilt opposite direction.)
Jab 1-> Grab/Pivot grab: Stupid. Shouldn't ever work. Ever. 17 frames for the grab to come out usually means they can DROP their shield and grab you, not even shield grab, and beat you to it. Not to mention it's not hard to spot dodge it on reaction. Don't do it. It's not worth it. (IDC if you pull it off sometimes, honestly, if anyone on these boards supports this combo, the Samus boards are truly a waste of time.)
Jab 1-> U-tilt: If you're jabbing them in the air, this is a great follow-up.
Jab 1-> F-smash: It's alright, but not a definitive kill set-up. You have to mind game it. Luckily, if you do manage to land it, it's usually a kill by 125% on a majority of the cast, assuming you haven't staled it. (Tilt up, you're close range so it won't miss.)
Jab 1-> D-smash: Good shield stun and knockback. Won't poke though. Great at punishing rolls and spot dodges (charge it.)
AND FINALLY:
Jab 1-> Jab 1: Underrated and overrated. Overrated by people like Jasona (if you've ever seen his videos) and underrated by the majority of the Samus boards. If you hit their shield with jab 1, all of the above options will fail. Either retreat or jab cancel into another jab and test their patience. They will wait for you to commit (a.k.a. use one of the above options) before attacking nine times out of ten. If you repeatedly jab 1, their shield gets low and they will be forced to spot dodge/roll/attack/grab. Two of those options you ****, the other two are MU dependent.
This is also probably her second best kill set-up. The first being homing missile canceling.
Otherwise, you're left to punishing to kill (which is hard to do... since everyone plays more cautiously at high percentages...) or to situational kill set-ups (u-air cancel, close-range z-air, weak-spotted n-air, etc.) that are avoidable. (If you're a floaty character, you can normally pull out an aerial or jump before the kill move comes out. If you're a heavy character, you can TDI down and buffer a shield.)
Good luck killing. If you manage to be the player who revolutionizes Samus by finding a kill set-up for her, kudos.