Raptor boost is actually fairly good against Marth once he commits to something [usually nair]
Just remember if that sword is between you and him, nothing you do is going to work.
But I think your problem against Marth needs an outside look.
Your problems that you mentioned are these, but the bigger problem is this
"Stomping repeatedly through platforms"}-
l
} Being above Marth
l
"Wasting my Double Jump on Marth's utilt"}
You liked to stay above Marth, an that's an issue. CF has a great vertical move, the stomp, but again, Marth has some great up centered attacks. Uair and utilt will wreck you, and unfortunately, he just kept you up there using those attacks. You're going to have to find a way down, either with SH then FF through the platforms, or running and falling off of platforms horizontally, shield dropping [moving and shield dropping is really good], Isai dropping, or shielding and moving your shield towards the edge of the platform so that when they hit the shield you'll fall off, where you can then DJ/use a move
So as you can tell there are multiple ways of getting off the platform
It's just the point that you have to get off the platform
I feel like that's your biggest issue.
Against Roy, CC is your friend
Like
The kind of friend that loves you for you
And has $19273043270414132
And lets you drive his Ferrari when you have a first date
That being said, you did a good job of that, just remember that CC is amazing
On top of that, Roy is VERY similar to Sheik in weight, so any kind of combos that work on Sheik work on Roy
Most importantly, that means that at 80%, you can uthrow->knee
We both know Roy has a ****ty *** recovery
So doing that then grabbing the ledge is like
A free stock
One of the things to remember with low tier character players is that
They can't compete with you on a straight up manner, which means that a lot of the times, low tier players will make traps.
They'll have you misspace, and then punish you for it. Which is great for them, because once they do hit you, it's really easy to continue the combo.
However, you are the most mobile character in the game. Which means that you can run in, spring the trap, and leave. Then suddenly, you're the one punishing.
This will be referenced later in the post.
With Peach, two things
1) Throw->knee only starts working at two very specific percents
uthrow->knee at 40% ONLY if they're not paying attention
And dthrow->knee 70%+
Any other time and nair/uair is better
However, luckily you can most of the time easily combo into knee off those two attacks
After dthrowing after that percent, you have two options
They're either going to DI up, and you'll have to fullhop
or DI down and dash into a SH knee
Discerning between these two is very important
2) Rushing down a Peach is really good
She can't deal with your movement, or your dair, or your knee. She can't CC those, and keeping in her face so that she can't get stage control or grab turnips will absolutely wreck her playstyle. Keeping on her is probably the best thing you can do.
You left a lot of space between you two.
[Also how do you do perfect gentlemans EVERY TIME
You have to be playing PAL there's just no other answer]
Against Falco you've got to stay close so that they can't laser
But mostly the reason you lost is because of non match up issues
Things you should work on
1) Movement
Your movement is really choppy, and a lot of times you just kind of throw out moves really slowly because you're not moving
So your opponent has time to see what you're doing
But you need to increase movement so that you can
2) Play more confidently
A lot of times CF wins games by keeping pressure and getting that momentum
And doing that is an extension of your pressure
And you can't pressure unless you're up there and confident about hitting them
Does that make sense? A lot of CF's match ups are made much easier by being close enough to punish things, so that you can do so. You left a lot of space between you and your enemy because you were afraid of getting comboed.
Practice your anti combo Di, Smash DI, and teching, and you can get over that fear.
So by using your movement to suffocate theirs, you can play confidently, and keep that pressure on.
Make sense? So try that and see where it takes you.