[COLLAPSE="Advice"]General advice: Less Dsmash, less Jab, less counter, less shieldbreaker. Or at least use them at more appropriate times. They are laggy and easily punishable, and unless used more sparingly will hurt you lots. Grab more. Marth's grab range is the longest non-tether, and it's awesome. Work on advanced techs like L-cancelling etc but I'm sure you knew that. Fastfall. Shorthop. I think the quickest way for you to improve is watch a lot lot lot of pro videos. I highly recommend Dr PeePee's footage from Apex, and anything that any of the big name players around here have touched. You'll get a better sense of when you should be doing what.
Breakdown of video:
0:00-0:10: Don't approach from above like this. Marth can do borderline nothing if he's under someone. If that link decided to utilt, uair, usmash... you'd be in for a world of hurt. If you fastfell near the end there, it would have saved you some pain.
0:10-0:25ish: Double ftilt fmash won't work on hoomans. For the edgeguard on a player this wouldn't work, run off fair, grab ledge to bair, iunno. But just standing there like that won't work on humans. The dair was a nice ending.
0:25ish-1:15ish : Two wiffed counters and a dsmash. Ouch. Against a non-cpu that would be punished, and brutally. Same goes for the three jabs at the air following it. You seem to really rely on dsmash, most times you use it you'd be better off going for a grab. Grab->bthrow->shenanigans->edgeguard->stock market crash. But instead you dsmashed
it isn't a very good move. The shieldbreaker from the skies is a nice mixup, but you were too close for that to have worked on a human the first time, and the second time a fair would have served you better. The dair on the left platform would have been a better fair. You got a lucky fsmash because of your missed counter following it
but you weren't able to capitalize. When someone is in a position like that, a dtilt would have poked him off the ledge, whereas even a tipped dair would have just bounced him up like that. The fulljump following this made me nervous, try to avoid unnecessary fulljumps. Fsmash would have killed where usmash didn't. Usmash is pretty bad.
1:15-2:00 : Don't rely on shieldbreaker so much, it's easily punished. For your recovery, you could have saved your jump there, luckily CPUs don't edgehog. Getting off the ledge attacks are typically a no-no, especially marth's over 100 one. A solid finish to the link's stock.
2:00-2:20 : Doublejump shieldbreaker? That's a bad bad idea. When you lose your double jump, your chances of getting gimped rise exponentially. And a 7% shieldbreaker attack that leads to nothing is by no means worth that risk. You do some nice aerial juggling for a minute against link there, this is one of if not the strongest areas of Marth's playstyle, focus on that kind of stuff more :D Stop using shieldbreaker so much :x
2:20- end: Nice bomb catch, not the best use of it though. Sweet finish. LESS SHIELDBREAKER
Sorry if any of that came off as harsh, you had some good moments in there. You definitely need to work on using advanced techniques (wavedashing, shffl, etc etc). Watch pro videos to learn when to use what a bit better. Do those and you'll get a billion times better :D! hope this helped in some small way.[/COLLAPSE]