0:02 I see you're using sun hat puff. Where's the flower hat at?
0:08 you fsmashed... Was that on accident? Please say it was. Don't smash this early. Save them for kill moves.
0:11 see there's an usmash, save them. When you use a move, they can stale. Everytime you use a move, it gets weaker. Its on a 10 move queue... So if you fsmash 10 times in a row, the 10th time it will do, like, 5 less damage, and have a lot less knockback. use 10 other moves again before usmashing. They may have to hit an opponent idk. Also when you die your moves are all refreshed.
Then there are a lot of pounds and bairs. I'd say it's always better to do a rising or lowering pound, opposed to a regular one. You should also work on spacing your bair, weave in and poke, and weave out.
I'll give you the benefit of the doubt though, your opponent is mad aggro, and it looks like it caught you off gaurd.
1:35 bad luck... be more careful there.
1:50 more smashes. 70% isn't kill percent.
2:36 solid usmash. Would've killed if the move wasn't stale.
2:42 rolling is usually bad. Jump, walk, shield, and spotdodge are usually safe and less punishable. Roll has its uses though.
2:18 shoul've Utilted IMO, comes out fast, and is a great kill move.
3:24 solid kill, you just died so your Fair was fresh.
Did I see an Usmash at 3:30? Really man, this stuff will cost you matches.
3:49 didn't know bair to fsmash could work. He was just slow I guess. lol.
Weave out with your Bairs. Move in, poke, move back out. A lot safer than just bairing and flying into his shield or his moves that will out-prioritize or out-range yours.
from 3:55 to 4, you Fsmashed twice. I know, I'm giving you this enough... Stop doing it below 100%, ok? ok.
now a lot of you getting man handled.
4:38 Uair is better for momentum canceling IIRC, but nice DI anyway.
4:42 you had that Bair coming, bro.
apply everything Grim said, and ontop of that you're quite predictable. when your opponent jumps at you, airdodge. You're puff, the only move you have with good priority is pound. If he's coming at you, run away. Play campier, and safer, and you'll land more hits and take less.