Personally I just can't get into discord, maybe I just haven't found the good ones but I'm always immediately put off by the level of conversation there. It's always the most basic subjects about whatever the discord is named after, repeated infinitely as more new people come in daily. Nothing ever seems to go beyond surface level.
Going back to TM specifically, I've joined a bunch of TM discords recently and the biggest discussions were about FGO gameplay or Saber characterization in Zero and and all the old and tired arguments that come with it.
Maybe I should try to find a smaller one, but tbh I kinda ignored this whole side of internet interaction until now. The only online community I've been a part of before BL was this chat copying Dollars from Durarara which had like 7 regulars on the BR server lol