vs falco:
what krynxe said about converting is good, but the main problem thats holding you back from doing so is that you give falco a
lot of time and space to think whenever you get him into a pressured position. for example very early on during the 1st game you sh shielded at him to (i assume) bait a getup attack which was alright, but the moment he picks another option (in this case he rolled) you should have wdoos/jumped/dropped shield/etc asap to keep up your pressure by enabling more options on your part and closing space, especially since falco is still very much pressured in this scenario. even though pika is a hit-and-run character by design he can lay down some sick combos vs fastfallers and usually has the speed to stick close to most opponents for pressure.
speaking of shields you approach with shield a lot, and trying to punish falco's pressure oos on every encounter will be a winning game for falco. next to that you try to predict too often with far-away dsmashes and fsmashes which can lead to easy punishes for falco once he catches on. you can't put up preemptive attacks and shields to punish with on every encounter vs falco - in this matchup you're forced to play the neutral game with approaches and spacing if you want to win.
another tidbit is that a lot of times you try shieldgrabbing him during pressure which generally does not work out well. looking for holes in his pressure to uair oos or wd oos is key to escaping shield pressure for pika.
as krynxe already pointed out don't let falco lock you down with lasers and pressure. either learn powershielding or weave around them with crouching, jumping, and platforms. take advantage of your horizontal mobility over falco so that he doesn't connect with anything solid, but don't let him corner you. also make your nairs less obvious and throw them out to catch falco doing something unsafe rather than only when you feel like you finally have the opportunity to throw one out (which is what your mindset looks like here imo).
some smaller things
on your fd match you should space your fh jolts so that you arrive right in front of his shield with your jolt. if you don't ff or cross him up it should be a free grab if he stays in shield. a staple in axe's play from back around '09~'10 i think. also you gotta cg on fd man
work on your edgeguarding too, dsmash vs sweetspot trades most of the times but doesn't always kill. low ftilt works well vs sweetspot. during your match on fd you just walked away from the edge at one point - don't do this. (even though you got the usmash ko in that specific instance it's possible to guard vs sweetspot and cover onstage recovery lag too)
vs peach:
first thing's first, dont cc dsmash T_T
you can nair through her turnips but this usually is more effective if you know one is coming at you. i say this because you sh into her turnips a lot this match. on the subject of turnips you get barraged by turnips this match. stick close to her and put on pressure to prevent her from pulling turnips.
don't be afraid to go offstage for edgeguards vs peach, she isn't a huge threat there and it's pretty hard for her to reset even if you mess up. just don't get hit by some random aerial from her float and you should be good
don't cp with yl he's dumb and pika's cooler
i know axe might disagree but whaattevverr maaann
generally same advice as vs falco though.