learn to play the matchup and win on a different neutral or a non gay counter pick. you can play a match on YI, BF, Lylat, Delphino, stadium, ect.
diddy is not only good on flat stages..... hes a robust character with a lot of options. you will run into this problem facing more than just mk. hes not even your worst matchup.
no offense but even pro-ban players didnt count this match.... its kinda pathetic. stop referring to it. people would let stuff go if you didnt get agitated so easily
anyone that can win with skill shouldnt complain about inuis stage list, it gets rid of random *** factors. im pro ban for RC as well, and i think its one of my best stages now.
there are plenty of characters that get ****ed worse than diddy against MK on the CP list and do fine.