These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Copy Cat Sue: Shinjiro, especially in the first Shadowchasers fic where he was quite clearly the author's version of Yusei Fuso, right up with giving him a similar deck to Yusei's and a Dark and Troubled Past with Yusei and even having an undefeated streak in the first fanfic, something the author was criticized over. Fortunately this was toned down in Power Primordial wherein he changes his deck and actually loses an important duel.
Win the Crowd Back: In-universe example. Part of the reason why Jalal agrees with the idea of the 2nd Duelist Kingdom tournament in Tournament of Shadows. With their public relations with Shadowkind faltering lately, the tournament would be a great idea to re-establish themselves in the eyes of the Shadowkind community, especially if a Shadowchaser wins the tournament.