I only watched game 3 seriously.
Don't dash attack at super low %s. In general, you seem to have a lot of problems understanding what you should be trying to do at percents. You fair > d-smashed him at 0% when you could have grabbed, jab > f-tilted him at like 150%+ when you could have d-smashed him for the KO, etc.
Grab more. I cannot stress this enough. You let this Falco get away with holding block to such a degree that you throw like 4 moves into his shield at once (I think you had a low bair > up tilt > jab > d-smash sequence?) and he comes out unscathed. You're not Peach. You can't pressure people to crush them, not without giving them a reason to come out of shield. You need to grab them so they're encouraged to not hold block so you can get other combo starters on them. This also feeds into your issues of low percent game, because grab is her best move to hit at low percents by far (other good moves at low % include needles > grab, a full set of needles, up tilt vs airborne foe, sometimes d-smash [if you can multi-hit it], and spaced aerials).
You have some very predictable (bad!) habits against lasers. You jump predictably and waste your double jump (if this Falco had been more aggressive, you would have been ***** because spending your jump = you have no real combo break against his tilts and other bullcrap). You also platform yourself a lot. Or you just sort of submit to his laser pressure and start blocking and moving around with block (and do nothing else, which gives Falco total control of the situation). You can do more than this. Try crouching his medium and high lasers. It lets you compete for the ground a lot better. SH over the low ones when he switches to super low ones to counter your duck. Stuff like that. You can dash under the high ones that he'll shoot to cover your jumps, so try that.
You have to make Falco work to keep you under control. Submitting by assuming a single basic defensive stance and holing up in it will just get you wrecked. You gotta kind of flow and disrupt his rhythm so he doesn't take over.
When using nair oos, you need to retreat with it more often (if it doesn't initially hit). It's not meant to turn into an approach oos or anything, it's just anti-pressure (usually). Drifting into Falco with a medium priority, weak move is suicidal.
During tech chases, don't f-throw. Unless you're putting them near the edge, or something. Even then I'd advise against it because your tilts work better for that, and d-smash is better if you're going to abort mission and quit while you're ahead. Against Falco, you have some good combo options out of d-throw around 50%+ if he doesn't DI away (f-tilt, d-tilt, d-smash, jab, etc) that would be worth exploring so you can spice up your punishment on him.
You engage him in only a few ways when he's on the platform and most of the time you're not even spaced for your aerials. Waveland grab. Wait sometimes. You're letting him get away with blocking your moves so much. If he attacked out of shield in a lot of these situations, you'd be very screwed with how recklessly you're throwing your body into his shield.
Minor note: I saw you shoot needles when the opponent was above you. Don't do that. Pick your moves based on where they are, or are going to be.
Blargh.