I used to be very angry at everyone - especially my Dad and I was constantly frustrated and felt worn out by feeling I had to explain myself to everyone, try to fit in or prove my worth.
I was painfully shy at school and never had many friends or connected well with people, but what I did focus on was something I loved.
Mine was music and drawing - find something you LOVE (even if it's something others might deem stupid) and devote yourself to it.
Try to turn your anger into something positive by focusing on the thing you love.
I also kept a Journal and (sometimes with tears streaming down my face, or shouting at myself and the whole world) get EVERY thought in my head out into the journal the burn the Journal in a bin somewhere out in your backgarden when you know you'll be alone.
EVEN if the thoughts you have in your head TERRIFY you - and even if they involve doing harmful things, Get them out of you.
Even scribble, scrunch and throw or rip the pages if you have to.
I ended up with an aching wrist and was exhausted and completely spent emotionally as I pretty much wrote non-stop when I started, but by the end of the day (and with many pages filled) - I felt better
I know the above sounds like a lame exercise, but honestly, it helped me.
Afterwards, I took my journal outside when I would have some peace and quiet, lit it and watched as it burnt to ashes.
I felt cleansed in a way and glad I no longer had to carry all those angry or hateful thoughts about with me
You're not alone & I'm glad I joined this Forum - just being able to be with others who understand what we're going through is healing in itself.
Wishing you all the best