I am very worry about new merit system. This is like killer rules for newbies like us. As i know that if somebody gives merit rating only then our rank will grow. Without getting merit from someone we can't rank up from jr member. So, who will give us those merit rating? Is this rules for avoiding new comers in bitcointalk? I am truly feeling too bad.

Do not worry about merit point system, if you are a worthy person, you will surely get the points of merit point system.
And to answer your question, this is some statistic that i gather on my thread, there is an interesting fact about low rank member upon this merit system

As you can see from the yellow box at the right, low rank member is the most rank that is affected by this system, but some of them are happy and agree of this point and some dont but the number is bigger on the agreement of this system. This mean that some low rank members are a positive person and wont leave forum just because of this.
If you want to check my thread you can come to here
https://bitcointalk.org/index.php?topic=2822349.0(i use a lower resolution for the graphic, the original one is on my thread)