Most Helpful Guy
Most Helpful Girl
I can't imagine anyone would want to stay in touch if the last thing they heard from you was not only that things are over, but a lengthy description of everything that's wrong with them.
I get that you're probably breaking up with them after finally having reached your breaking point in culmination of things getting to you. However, it's best not to go to such lengths to show them why. It casts you in a bad light Makes sense that you do it to almost affirm that ending things had been the right choice. in the end though, I seriously doubt any of them will take your 'constructive critique' seriously.
Next time this happens, feel free to write out all your feelings, but maybe in a journal/diary of some sorts instead. I try to write around a paragraph or so in my journal at the end of every day, especially if I've been in a disagreement with my guy. I find it helps not only organize my thoughts on the matter having them out on paper where I have to really think them over, but also helps calm me down a bit. Having your thoughts laid out on you like that can often help you see things much clearer, cut off the vicious cycle, and lose the negative mind-set much quicker. :)