The only thing that is unreasonable here is that this thread is kept in that section. It belongs to Off Topic. You want (alleged) exercise and fun? Go to OT.
Calling the thread "the stupidest thread on Bitcointalk" or saying all other stuff was unnecessary if your purpose was only to say that the thread belongs to the wrong section. You could start this topic with a title such as "Does this thread actually belong to this section?" or maybe, "This thread is placed in the wrong section" or anything else that could convey the point you are trying to make. What you chose as the title and then as the body of your topic made it look too negative and that is the reason why you are getting so much criticism for it.
There is absolutely nothing wrong with that thread, in my opinion, if you thought it's in the wrong section, that should have been your only agenda with this thread. We have far more serious issues in the forum to deal with rather than pointing fingers at specific threads that are literally causing no harm to the forum as a whole. A thread being placed at a wrong section doesn't make much damage, to be honest, but still, showing concern is good but if it's done with good intent and suitable representation.