Based on a cursory glance at the HTML code, this place seems to be made up out of a absolute metric ton of JS mess running on some AWS hardware. Javascript is slow, especially when over used. I can't say wether or not this mess of JS is the result of the website building tools they may or may not use just being bad at not making spaghetti code, or of they hired a webdev that tries to solve every issue with a bit of JS code. Either way this overusage makes the website so slow it feels like we're back to the early 2010's where it was so bad we sometimes even needed browser plugins to block it.
That explains a lot! I don't think I've ever used a forum as slow as this one...
