The post is seemingly from an account that loathed works by Spike Chunsoft (the developer of AI: The Somnium Files), including Zanki Zero: Last Beginning and Danganronpa Another Episode: Ultra Despair Girls over allegedly pedophilic content.
As an aside, a young character in Danganronpa Another Episode: Ultra Despair Girls has a backstory where she was sexually abused. The Twitlonger post author claimed this was designed to be erotic for the games fans, as oppose to revolting, shocking, or making players feel pity for the character.
Meanwhile, Zanki Zero: Last Beginning has tragic back-stories for all their characters, all if then centering around the murder of a child. Some characters had backstories with sexual abusive events happening to them at young ages.
These include a character who traded sex to a teacher for protection from bullies at middle school, an older man stating his sexual interest to a younger boy, a child discovering they were the result of an incestuous relationship, and a character who was forced into an incestuous relationship with their own father.
The revelation at the games content caused the Twitlonger author to become exceptionally upset. When they were crying about it on the AI discord, an assumed moderator kicked them.
The rest of the post discusses how the user was kicked from another Discord server prior (focused around the Dangan Ronpa series).
When the moderator who kicked them due to their outburst acted in a manner the author deemed inappropriate (She retweeted a really shitty joke about Ota getting raped while cross-dressing) they attempted to reveal this to other members of the Discord server. They were kicked again.