We always talk about how cringy fandoms can be, but we never talk about how good they can be. Specifically, how they fix a character that was terrible on the original product.
My example isn't a very obvious one. Quint, from MegaMan. This character was introduced in the Gameboy version of MegaMan 2. He was a very interesting concept, being a version of MegaMan from the future that Wily stole and reprogrammed. However, he was extremely weak and got beaten really easily. But the MegaMan fandom redeemed him, thanks to two wonderful fangames. MegaMan 8 Bit Deathmatch has an amazing secret boss fight against him, painting him as a false futuristic hero bent on saving the timeline, meaning destroying you. This insane 5 phase boss fight is extremely hard and super fun. Then, there's Quint's Revenge, a retelling of MM2 GB where Quint breaks free of Wily's control and wants to defeat them in Megaman's place. What are some examples you have of this?