falcons worst matchups by far are fox/falco. good falcons can **** fox/falcos if they are experienced and can finish combos, but in terms of the games physics, fox/falco just has nearly infinite options when it comes to comboing falcon to death, . spiking shining and aerial priority can overwhelm falcon's defense to a degree. grab combos rely on tech chasing (if they DI correctly), so you really have to focus and finish combos to have a chance at winning. they are the only thing close enough to be called a counter, IMO, although they really arent if you are just good.
sheik can be bad if she is camping really hard, smart shieks can really limit falcons approach, but all it takes is a simple trick or two to land a couple hits and a grab, and then the **** can ensue from there. grab combos and ledge games on sheik absolutely destroy her, just gotta get that opening.
just dont go off the stage or get hit in the air against marth. once you do that, just grab and ****.
does anyone really have trouble vs peach still??!?!? should be a no brainer.
dair and bair ICs. all match. dont land close to them, just driveby bairs and dairs.
any other matchup should be disgusting **** with just simple grab/dair/uair to knee combos. you should probably win just solely kneeing all match.