everyone hates samus she just SUCKS, there is no way to beat her without being gay but if you do play gay you absolutely **** her
listen here is the deal with samus, she loses vs you on the ground and she loses vs you in the air. shffl nair is stupid because she can cc dsmash, but cc is bad for everyone in the game vs CF because you have an awesome dair and a knee. spam the hell out of it if you see a cc coming and she won't be able to do anything about it
grabs are ****, people think you can't grab combo samus but you can, uthrow uairs or dthrow nair/uairs work fine, and dthrow knee combos vs various DI at higher %s
if she ever jumps then lol game over, uair the crap out of her. upB OOS is really good for her but just be smart and it won't do anything besides annoy you. missiles can be good too but just be wary of them when you're recovering and nair through them onstage, you'll be fine
also if she ever fsmash or dsmashes your shield, you can knee her no questions asked. if bad comes to worst most of the time you can just bait her smashes and get her offstage from there. edgeguarding samus is easy, drop down bair her or her bombs, and drop down dj uair when she teathers