I used to have the same problem you did. The best way to deal with this is just keep going in life...keep reading The Power of Now... and study stillness speaks.
Eventually you will slowly raise in conscious will power and be less noisy with your thoughts.
As for what is happening....your mind is seeking presence as if it is something that the mind (the mind itself) can imitate or act or play as a role.
Just stop thinking for a 20 seconds....and then go back to thinking. Practice this at least once a day and you will grow stronger trust me.
It is like exercise you cannot be present or free of the mind over night. Life, age, and growing take it's toll for you to be more powerful and gain enough consciousness to become present.
As for the anger.... your mind will feel a hatred towards other people, it gets angry because people are not living or doing what you believe "think" they should be doing or acting.... It's basically judging.... and it's part of the insanity of being possessed by thought.
Presence is when you are watching everything but not thinking about it or labeling it or trying to forgive something out.... Hence it's a watching or perceptive looking but not thinking.... you just observe with your eye sight (the eyes are in my opinion where the most consciousness is at ) Look, listen, but don't think or offer an opinion or try and describe the experience to your self.
Presence is hard to obtain because consciousness needs enough will power or presence to be strong enough to raise above thought. It takes awhile and lots of re-reading Power of Now and Stillness speaks. Study those books, if they don't make sense, just try and grasp what does make sense, relating to your mind, psyche and body.
Goodluck buddy, hope my pointers helped.