I dont think gannon has any moves that make it possible to win a match up like that. There isnt anything you can do about it.
Ok, lets look at this movement by movement.
keep in mind that the following is an unbiased look at how far away you are from perfect and that NOBODY can undergo this kind of analisis without "perfect control"
at 0:10 he could have eithe WDed forward so his angled Dtilt was in range, or have stopmped him for the stock.
at 0:34 and 0:37 a stock could have been taken with a chadddtastic Fair.
at 1:05 two failed Lcanceled Bairs in a row. (im not sure if the Uair after was Lcanceled or not, but I dont think it was.)
at 0:28 a stomp would have hit, instead he threw out a Nair.
2:53 was asking for the Fsmash, should have grabbed the ledge and risked the drill.
at 3:12 there was an empt dash attack when it could have been a free Bair.
3:32, could have thrown out a jab here, guini style.
3:33, im surprised he didnt punish with a Dsmash for rolling into him.
3:39 a roll into the edge of a platform? why would you ever do that? spot-dodge instead if you must.
3:44 as magus mentioned, Dthrow to a tilt is much perferable to a jab imo, but you always do this, so i may be mistaken here.
3:45 Im pretty sure you could have seen the roll in time to whip out the Bair. followed by an edgeguard.
4:05 again, no reason to wait to see which way falco was gonna fly, he was close enough for a chaddddtastic Fair even before his upB got to go at a significant angle.
4:16 see above, there was plenty of time for the fist of death here.
5:11 Ok, you didnt just tech roll into him here, you just plain rolled into him, out of the blue.
5:18 Another failed L-cancel.
That was more then I expected, and I still may have missed a few.
I like to do this kind of analysis every once in a while, It really does help everyone who watches the vids to ask themselves what should have been done in that instance.
However, When Lambchops starts ****** you, and you lose all control, there is not a daamn thing you can do about except to call him daddy in the hopes that he will get off and finish early.
PS
I really hope you read all of that chaddd, I really think some that stuff could help you get near perfection. more of your perfect Fair edguarding and... I mean, your still **** sexy, but nobody is above improvement, even if its off of advice from an unknown... whatever, best of luck.