I'm going to be a bit more harsh with this just because it's what I noticed. Also, I'm not gonna pretend I'm good in all these areas, either.
Your neutral game seemed kinda lacking. I'd say you should focus on your movement a lot more in the neutral game. DD and WD around to make your intentions ambiguous and yourself inherently harder to hit. Mix in a lot more lasers, too. If Fox is across half of Battlefield, there's nothing wrong with shooting a laser and trying to establish dominance through more lasers if the first one connects or your opponent fails to handle them well.
Your playstyle also looked kinda jumpy and your approaches weren't too solid. If you're going to dair, go in ready to do a low SHFFL dair on shield that is immediately followed by a shine. It's the only safe dair you can do on somebody's shield. When you go in with nair, you're going to want to do a mid-height or low SHFFL nair, also into shine. When you get them out of their shield or manage to get a shield stab, do everything in your power to get in a followup shine, as that leads into a super easy 50% before custom combos come in and start being extremely fun. If you're going to jump in the neutral game without intent of lasering or attacking, make sure you generally only use one jump and FF. You messed that up a bit.
When you got a punish, I only saw two or three followup hits, even off of a shine. The easiest way to combo fully on reaction is to WD down as soon as you land a shine. Also in terms of the punish game, the commentators said you did a lot of b/fthrows, which are good as mixups. Uthrow shine is, provided you can react quickly to their DI, pretty much guaranteed against low% fast fallers, and it sometimes works at higher%s as another mixup. Uthrow shine falling bair onto platform for another easy followup is actually super solid. Just something to practice.
I don't have much to say on this front, but... please work on teching more. It seemed like he punished you a lot for missing techs.
As far as the edgeguard game goes... it seemed like he shortened everything so he could get the ledge. After they successfully get two or three shortens for the ledge, just start WDing off to get him. It's a practically impossible reaction, but it was super readable after the first few times.
When your recoveries come in, you seemed to love to just ledgehop Phantasm, and got read for it. One of your options is to mix in lasers from the ledge. I know that they're not safe, but the highest laser you can do from ledge actually hits the side plats on BF, so you can catch him there. If you've got space, they're also safe. If they're all up on you, you can do a ledgehop aerial, generally a lower nair or dair (fast fallen), to keep them honest. Also, if you're confident enough, you can do a ledgedash utilt, shine, or even fsmash. Yes, ledgedash fsmash sounds stupid, but you're actually invincible until the move's active, so it's not actually as big of a risk as you'd think. Another thing you can do for your recoveries is just sideB less. I understand that it's faster, but it's actually really easy to react to and punish, unless your shortens are as good as those of Westballz. If you can, try to upB a bit above and away from the stage, so as to make it super difficult for your opponent to shine spike you. Once you do that, you have a TON of recovery options, and it's far harder to react to them. Not impossible, but definitely difficult.
Nothing else I can think of immediately after just watching the set. Your techskill and basic combo sense weren't that bad, though. It's not like you're just a completely crappy player, you've gotten a lot of fundamentals down pat.
One last thing: Solely playing netplay isn't too good of an idea unless you can play with a low enough ping that there's no lag. Try to find people that live nearby you and are around and slightly better than you to practice against regularly. Against players that are better than you and you think could point out your errors (generally smaller things like those I pointed out above), then there's nothing to lose by asking them to do so.
Good luck in your journey with Falco!