well, here I am at 4AM not sleeping so, sure, I'll give you my 2 cents. what you are looking for is a way to off your beloved rooster who has gone bonkers without it being traumatic to you. I have had to put down several roosters over the years simply because we can't keep them due to ordinance here in the burbs. it's always rough on the kids especially to have to say goodbye to one of their birds that they hand raised and no one wants because there are so many. so in such a case my preferred method is relatively gentle and bloodless, which is the key I believe, to not leaving you with a traumatic memory.
I hold the bird, calm them down, turn them upside down and clamp the neck with my thumb and index finger, shutting off the blood to the head and they instantly "fall asleep". within 3 minutes of clamping, they are dead. you will get some jerking as nervous system shuts down. you have to be ready for a projectile poop that can come out with a lot of force, so aim appropriately so as not to get it in the face. Have hubby do it, everyone who is super attached to the rooster should be somewhere else. have a hole dug somewhere special where you can visit, if you wish. we have a pet graveyard for our beloveds for those who have crossed "the rainbow bridge". have him dumped in the hold and buried a good 2 feet under to reduce the chance of him getting dug back up by predators and paraded around the yard. theres no bloody mess, no chicken with it's head cut off running around. I have a horrible memory of the axe method as a child and I decided I never wanted my kids to have that stuck in their heads. we do also have meat birds and use the cone method but these are purpose raised and the kids know not to get attached to them, so that's a whole different matter. don't worry about the wasted meat, rooster meat is really not easy to cook in a manner that makes it worthwhile unless they are meat birds and young, not sexually mature. once sexually mature they become like rubber bands to eat.
that's my 2 cents, hope it helps.