I'm a falco/puff, and while I'm not very experienced, I can give you some tips that may/may not help you.
Game 1: You kept overextending your combos, and gave the puff free hits. Recognize when puff comes out of hitstun and don't try to follow up something that can get you punished. You also randomly use your double jump, even though the puff didn't punish you for it, you should treat your double jump as sacred.
Game 2: First rest punish was meh. Puff nicked you after you wasted your double jump and you lost a stock for it. stop using smash attacks in neutral. You can't get any followups for them, so its very high risk low reward. Don't SHL on the ground if she's way up in the air where it can't possibly hit. At high percents Backair will start killing, yet you kept using down air and allowed her to live way too long. She missed the easiest rest, great punish on it. Don't be afraid to use a lot of AC Bair.
game 3: Lost first stock to ledge jump. You sometimes retreat too far/at inappropriate times. That power shield turnip. On your third stock you did a hedgehop double laser while she was still on the platform. I don't know what that was about. A lot of questionable recoveries. Pay attention to what other falcos do on ledge.
