I think he had a run-in with some fat woman in his school days and has ben obsessed with that event ever since. He regularly made comments relating to some fat woman that annoys him (which is kinda strange, cause in a different thread, he mentioned that he's into chubby girls) and then there's this gem:
View attachment 1418616
Translation: (First paragraph is a comment about some other guys poor writing, so I skip it)
That part about "The Fat One" sounds like something straight from OPL about Mary Lee Walsh. I would not be surprised if this ties into him being forced to leave his school.
Explanation for non-germans. Broadly speaking: After elementary school, in Germany you're send to either the Hauptschule (preparation for handcraft), Realschule (preparation for administrative work and for mercantile related jobs) and Gymnasium (preparation for academic work and fields). Webby originally went to the Gymnasium, but was downgraded for being a sperg and graduated from a Realschule instead.
Small edit: The story idea above is something that he unironically mentions as factually true like he's arguing his delusions about cartoons being real in another dimension. He seemed to believe that there are massive intergalactic wars happening and that he somehow is tied to that as some sort of warrior. /edit
I think it's part of his mental state. He tries to fit in for a time, but eventually spills the beans on his retardation more and more.
He literally can't stop posting about how he believes in cartoon world being a real actual place, shit like this slowly builds up, he slowly gets into conflicts with other people and eventually goes full sperg like now.
His former usernames that I am aware of:
Tahiri the Cool (Sometimes Tahirih the Cool)
Antanica
Space Warrior
He used these on a German Brony website. Yes, you'll be surprised and shocked to learn that he's a Brony who fapped to pastel horses and stalked some 17 year old User named "Lili Clive" amongst other female users.
She had some typical Girl-on-the-Internet thread where she was attention whoring and he tried to flirt her up and asked her for images on a weekly basis for several years. She usually just cockblocked him (especially, since she was in a relationship already) and the cringe is off the fucking charts. The other users in that thread would eventually grow tired of his ever increasing bullshit.
It started out in 2012, so it has been a long time ago, but his last desperate attempt to get into contact with her was in 2017, so he was simping for her for 5 fucking years.
Highlights include him asking her if she's going to miss him, cause he'll be gone for a week and she flatly goes "no".
Dude was always broken goods, only he suppresses his bullshit for some time, it seems.
Maybe I'll look up some more stuff from his past, to see if there's more gems, I've only scratched the surface by skimming his oldest posts it seems.
This sort of behaviour extends at least to 2012, when he started to post on the Brony forum that I mentioned above.
He got into arguments with mods over posting too many Dolan memes, he'd constantly mention that he's an alien hiding on Earth and that there's a huge intergalactic war happening. Some shit like that.