Just a quick post cause its late, im tired and I'l probably not make much sense.
Really glad this Thread is up.

Have been having a difficult time myself dealing with my Anger/Frustration/Intolerance ATM. Everything seems to be pissing me off, I'm having rapid emotional up's and downs and I'm weary from it. My partner and I are on a break, to boot , and he's the one person I could confide and entrust with how I'm feeling.(We're both 'Emotionally demonstrative'lol people but we work well at supporting each other in this way)
Anyway, my usual rule of Thumb for myself, is to talk my Anger out till I get to the vulnerability stage and then I usually have a good hard Sob(by myself, or even better if D's there)-this usually clears my mind of any clogged up emotion and unencumbers me from the weight of that Anger and Confusion.
Can understand that this may be different for a guy however; dunno how you are with breaking down emotionally....?
Find/Maintain people who you can trust/will listen or be understanding about how you feel. Im at home with my family at the moment and its all very repressed and stifling and I feel like a complete lunatic!
So perhaps, make a concious effort, to surround yourself with non-triggering people and if your stuck with people who trigger you then walk away or talk yourself down in your head, or like someone mentioned in an earlier post, Detach yourself from the situation and you can process things later in a 'safer' space where you dont feel your exposed.
Also,when you recognise and become aware of any triggers, moderate any stimuli which may be fuelling your anger. These may include Movies, Music, People, News Bulletins, Places. This is not to say you strictly censor your lifestyle but if something is causing stress to build up in you-it's up to you to be Aware of it and act accordingly in your best interests. Know this may sound petty, but just bear in mind, that since your off substances you may be very sensitive to things which you ordinarily wouldnt have been before!
To know yourself and how you feel will empower you to deal with your Anger and help you use it more appropriatley and sublimate this energy into something you can use to your own Advantage.
I struggle with this issue too though, so am no expert. I get quite ashamed that I cant use my Anger Appropriately;I either hold it in, or Neurotically Spew it out at a later date usually when the issue in hand has long gone and I end up with myself feeling like a complete nut!!!
At times like these the ability to laugh at oneself really helps dissipate it- but this can be difficult when feeling so out of control.
...and btw anyone worth their salt wont judge you based on how you look alone, they may though, like you said be picking up on how your feeling uncomfortable with yourself, so just try and be kind to yourself and let yourself relax into being open to who you really are, and open to others too. Think the core issue is to nurture your own sense of vulnerability first, that way unwanted anger wont be impulsively recruited to substitute or overcompensate for that raw part of you that needs protection.
I remember an old friend of mine said something invaluable to me once, she said: ''Noone can take away your Essence from you! ''....they can hurt you or intimidate you but if your aware of your own power they can never break you!
Sorry if this is a bit obtuse OD, am falling asleep!Best of luck

