Okay it’s not funny anymore, how do I get out of a thread???
Discussion
That’s the fun part - you can’t
On Android use the current version of either Nostros or Amethyst. Both have a solution for your problem implemented. Nostros offers manual muting of a thread and Amethyst changed the notification parameters to exclude your hellthread.
On iOS I don't know.
h/t #[2] & #[3]