i guess its a shame we're not all as perfect as you..
Wow bro, I understand being frustrated but you just made it look as if you are still angry. That guy is right, it just looks like you are angry in general man, you need to relax a bit.
Also, you come out looking for advise and the first thing you say is "don't say count to ten" well guess what, COUNT TO TEN my friend, breath deep and think for a second.
How come the move did not work? Check your finger positions, that is the first critical point that many of us miss. Second, try to slow down. It is another critical point. I know maybe you have done a cut and it works out and then the next time you cant do it worth anything, well, it may work to slow down and try to think the movements through. Also, look at where you learned the material from, read the explanation again, see if you missed anything (I know i have skipped parts because "I already know how to do that" and end up messing up the trick or flourish).
Above all, take a good look at yourself and what others have accomplished. In a recent interview, Dan and Dave Buck have said that they used to practice their sleights and flourishes for about 8 to 10 hours during high school. That is hard ass work man, but it is worth it if you aspire to be great at anything you do. So, if you feel you are getting angry because you practice a move a whole bunch of times and it still does not work maybe you need a different approach of a different hobby all together. Magic and flourishing both take a ton of patience to do right (a lot of people say they learn things in a day... but how many can perform like the masters in a day?). If nothing else our art can develop your patience and you will be a better person for it.
As a final remark, please do not lash out at other forum members that are just trying to give you advise. You came here for help, asked a questions, and now you just have to deal with the answers given. If you do not like such answers, then maybe you should not ask questions in an open forum like this one.
Juan Martinez.