I felt the same way, but if you spend enough time reading FE forums, you’ll find people are presenting themselves pretty earnestly. No doubt any FE’rs on Reddit or 4chan are mostly just baiting, but there are some very real disciples out there.
It’s a little hard to follow the arguments, but I think they’re being made out of honest conviction. It’s a fascinating little corner of the internet, one has to wonder if it will live on.
I've got a take that's a bit of a hot take, but experiencies like yours make more sure about it.
I don't think _any_ of the flat-earthers actually believes it. They're just there for the attention/lulz.