Imma still answer, cuz I retired for a while, and you guys did away with tW while I was gone, and then I forgot to change it cuz I'm lazy OK gawd geez
I'll change it soon dont worriez
A. Its 19. I'm actually a math major lmao....
B. I think Peach wins the MU. Without going into too much detail, Peach's Nair comes out faster than most of Chibi's aerials. Her aerial speed also allows her to get over Chibi's N-spec. Peach does have a hard time edgeguarding chibi, but she can finish him off with a well spaced Fair. Both characters struggle to KO and edgeguard each other, so it comes down to the neutral game, and I think Peach has the aerial tools (and turnips) to win. For a ratio, I'd say 60:40 or 55:45 in Peach's favor.
C. Oooo, that's a tough one, I have so many cuz I can get pretty salty lol. I've gotten plenty salty over losing to spammy noob narutos as Peach, but probably my most significant salty moment was when I lost to FrenchKissHey in Loser Semis. I really feel like I had a higher skill level than him, but the lag on his end, along with him being used to his own lag, beat me and I was so frustrated that I didn't move on. I really feel like I deserved to be in top 3 and I lost to lag. (If I'm remembering this wrong tournament wise someone can correct me, its been a while...)