But, in my opinion, ranking up is way too easy now.
I agree with you but it's also true that high ranked users send merits to other high ranked users.But they don't give merits so much to those who are working hard to prove them.
That's why Newbies are getting disappointed and approaching to make plagiarized posts.
You agree with OP and then you end up saying that newbies find it hard to rank up? Don't see that you are contradicting your statements?
Maybe the newbies you are talking about are posting in the wrong places like Bounty threads, ICO spam threads etc. I have seen so many newbie accounts that make contributions in the forum earn merits even on their very first post. Stop having such a negative mind if you ever want to receive any Merits
Ranking up shouldn't be made more difficult either. It's not a competition or a game that has so many difficulty levels for God's sake

The purpose of the Merit system was to kill spam and account farming, period.