I don't know if my terminology is correct, but here's an explanation of what tilting means: http://www.urbandictionary.com/define.php?term=Tilting
So a little about the situation: I do Dota 2 coaching (Dota 2 is a very famous multiplayer video game) and usually the first coaching i ever do with a student i would clear misconceptions and get him to think properly. For example someone would come over to me and start complaining about how his other teammates are bad and he can't win games because they're holding him back (Dota is a 2 teams 5 on 5 game where you get matched with some random 4 strangers for your team). Now in most cases i can clear out these misconceptions by giving proof (for example that if he had my skill/experience that he'd win all these games). this creates trust in between us so he will become more open-minded and he can learn faster. This method is the best I've found so far and it revolves around having a nice approach to your student which will result in him learning faster/better. Now most people will be able to be converted from a way of thinking where they blame their teammates for their own mistakes to a proper one where they will blame themselves and are open to improvement and being criticized. But there are some cases where people will go back aka tilt due to a loss or other reasons that can cause stress, i think this might have to do something with defense mechanisms which are very common in these cases (aka they'll try to blame others, reject advice or try to find excuses etc.).
So my question is: how do i get a nice approach or method to prevent someone from falling back into a older state where he isn't very accessible?