a few random things;
if you're both offstage, but they're closer to the stage than you, go for a pound, not fair/bair. pound will send them behind you, ripe for a wop or edgeguard.
space your aerials a bit better. you landed right infront of him quite a few times, and he got a few grabs because of it. aerial -> drift away, or aerial -> land behind them. you may know this already and just messed up a bit, idk. :]
you got a lot of grabs in. good stuff. maybe toss some dthrows in there for variation? dthrow uair is nice.
you stagespiked him, but you died too. why?
did he dair or something? idk
oos rest marf's fsmash if you're close enough. rest his recovery if possible. risky though, tippers are painful. :[
i like nair/bair vs marf at low-med% cause with fair he'll usually just fair you right after he gets hit :[ gay
vs marf, use the marf edgeguard if he tries to sweetspot. roll to the edge, put up the lightshield, di towards the side your opponent is offstage. he'll hit your shield and you'll fall and grab the edge.
nair -> fsmash is cute, i think i saw you try it once
uair ***** marf
wavedash oos. hard on tiny stage with gay marf but its good for spacing. run up, shield his smash, wd towards and grab or rest or something cute
i suck so feel free to correct me if need be, fellow puffs :]
edit: oh and my bad Tamoo if you know any of this stuff, im not like talking down to you lolol. just pointing stuff out just in case.
also, cstick spamming marf is gay as ****