Conti
As with any thing I point out here, I preface it by saying it doesn't come from a place of expertise, take it with a grain of salt but at least thing about it.
Vs. 404Cray
There were some very good moments in there.
Tech skill flaws:
Movement out of shine. Your waveshines, and just generally exiting shine are probably the weakest part of your tech game that I could see (purely technical stuff).
OoS game is weak, you need shine OoS and you need wavedash OoS, both sorely missing and really constraining your ability to counter attack.
Ledge game is weak, ledge dashing and double laser, as well as mixing in quick aerials from the edge might be good.
Habits:
A couple of obvious bad habits to clean up are forward smashing in neutral, and as an extension, your use of forward smash in general is poorly considered. Even when it worked it was dumb (charged Fsmash to edgeguard in the first game, you should have waited and tilted to cover down angle, bair to cover anything else).
Aggro in the scramble. This is actually a good thing to be doing at this level because you need to find out when you can beat someone else to the punch. That being said, your tendency to go aggro in the scramble may be an issue if someone else has a read on you with faster/better moves as happened in the early stocks on Yoshi's story.
Decision making:
Your lasers were either poorly timed or poorly executed or both a lot of the times. Count how many times you got hit trying to laser in those sets.
Fsmashing, check it, it's dumb.
Positional game, you don't need to be so aggro when you have someone pinned to one side of the stage. Wait for them to try and weasel out of it. Lasers, turn around u-tilt, f-tilt, dash dance bair (pivot bair), jab are all fantastic tools for stuff people's attempts to fight out of a corner. When you go in, you give them a real simple way of getting out, just roll after you shine. If they turtle up either max range bair their shield until they roll or grab them from your dash dance if they're really scared.
As an extension of positional game, what you decide to do when people are on the edge is over-commital and a couple of times got you killed in your GF set, charging F-smash and hoping they jump is profoundly stupid (I do it as well sometimes, gulp!).
Hair game:
Wack, lose the fro.