>>1941351Because 4chan - the original 4chan - died in about 2010 and it has been downhill ever since. Got worse when /pol/ was started and moot only made that to be a containment board for the politics and racism, but instead it and coupled with the 2016 Trump election and mass insanity that took over Americans, 4chan got infested with normies and right leaning Americans.
The real train foamers hang out on
https://www.1chan.net/. It's slower and posts have to be manually approved but it is an imageboard that has been online for 20 years straight and is one of the oldest boards out there still going. Unironically check it out if you want some good train discussion at a cozy pace.