Do meditation or chanting make one less agitated? Understand that meditation helps to calm one's mind and does it also helps one get less agitated and less affected towards the unnecessary?

What about chanting? Does it also have the same effect?

If one is patient and he/she naturally will not get frustrated easily and not easily irritated by minor stuffs. That does not mean he/she meditated or chanted to achieve such state of mind?

I'm actually asking for myself. 

I'm not much of a patience person, short-tempered at times. I don't meditate but i do brief chanting occasionally. I used to do chanting when I was little and looking back, I feel like life was a little better back then and possibly less frustrated, not sure if it has anything to do with chanting.

Growing up, I felt as if life was so injustice and merciless and often got angry at myself and things around me.

Probably I care too much, i'm not sure. Things may not get on somebody else nerve but to me, it was so easy!

At work, at home, my surrounding, everything just seems so tough on me.
So I don't know what helps.
No, chanting does not make you less agitated. on the contrary, chanting makes puthujjanas more agitated and the buddha says it is a mistake for the bikkhus to chant, but the buddha allows ''intonation''.

The problem with chanting is that puthujjanas love to get carried away by the chant and as usual being carried away by the senses is the biggest mistake a puthujjana who wants to stop being unhappy can make.
So the bikkhus must avoid that in order for the bikkhus to stop creating suffering for the bikkhu and for and for the audience, so that the puthujjanas are not carried away by their words, which means preventing suffering in lay people. This is how somebody cares for oneself and for others, typically from having metta and doing karuna.

http://obo.genaud.net/dhamma-vinaya/pts/vp/03.cv/vp.03.cv.05.03.horn.pts.htm


  Having given reasoned talk, he addressed the monks, saying:
  
  "Monks, there are these five disadvantages to one singing dhamma with
  a long-drawn plain-song sound:
  
  he is pleased with himself in regard to that sound, and others are
  pleased in regard to that sound,
  
  and housepeople look down upon,
  
  and while he is himself striving after accuracy in the sound[2] there
  is an interruption in his concentration,
  
  and people coming after fall into the way of (wrong) views.[3]
  
  These, monks, are the five disadvantages to one singing dhamma with a
  long-drawn plain-song sound.
  
  Monks, dhamma should not be sung with a long-drawn plain-song sound.
  
  Whoever should (so) sing it, there is an offence of wrong-doing."
  
  Now at that time monks were doubtful about intoning.[4]
  
  They told this matter to the Lord.
  
  He said:
  
  "Monks, I allow intoning."