Another thing that factors into how the competitive scene of Super Smash Bros. might have an abnormal amount of pedophiles is the fact that the franchise is an E10+ game with numerous colorful, cute characters from over thirty franchises. For every Snake, there are ten Pikachu's. Children are more likely to be playing Smash games then other fighting franchises that require learning more complicated mechanics like Street Fighter and Tekken. It's not surprising that people like Cinnpie and Nairo take advantage, if not outright rape minors that go to FGC. This is the chance to drain the swamp on the pedophiles that lurk in the community and the Smash competitive community would be wise to take it if it ever wants to be taken seriously by Nintendo.
Of course I'm only speaking about confirmed cases like Cinnpie and Nairo. Obviously unproven allegations like the one on Anti needs more investigation.
P.S. Yes, I'm aware that Captain Zack also used Nairo in the situation and he should not be absolved responsibility for what he did. That doesn't mean Nairo doesn't share as much blame, if not more, for fucking a minor in the first place.