Burning of your double jump unnecessarily, guessing on too many moves rather than trying to bait falco into them or attacking in safe ways that could also be correct guesses on his positioning, too much bad dash attack, specifically(use that move not right away but after a moment or out of a DD so it can catch lasers or spotdodges), uairs when above people, upsmashes on platforms, lots of odd move choices haha....
against Falco you want to take platforms and WD OOS/powershield/take lasers and move so that you screw with Falco's spacing and counter his approaches well(not literally counter but you could). You're kind of jumping on a platform then running off of it immediately without reading the opponent or baiting him to come to you and otherwise doing a lot of dash attack. slow the match down for yourself and think about why you're doing each move you're doing. that should help a lot.