There are two issues being discussed here:
- The first one is the misbehavior of a passenger and the lack of action from Qatar Airways and Security at the Doha International Airport.
(By the way, 3 days have passed since I send my report to Qatar Airways and so far there has been no feedback nor acknowledgment);
- And the other issue is the comfort of the economy class seats provided by Qatar airways.

The second issue does not give any excuse to the aggressor to behave the way he did. What he did was wrong and he should have been punished as he would have be if he was landing in most of any other international airport on board of most any other airline!

I sincerely don't understand how Qatar Airways could get the "best economy class award" when there are other airlines providing much better services and comfort.
A genuine 5 star airline listens to their passengers and uses their feedback to continuously improve their services.
Let's take the example of Cathay Pacific; they introduced new seats, fit in a shell, so its movement won't disturb the passenger sitting in the back. Have a look:

"The fixed-back shell seat in our new Economy Class ensures that no one in front of you will ever intrude into your space again. So you can relax and enjoy your 9" widescreen TV with StudioCX – featuring a rotating library of 100 movies, 350 TV shows, 888 music CDs, 22 radio channels, and entertainment programmes in nine languages."

http://www.cathaypacific.com/cpa/en_INTL/whatonboard/neweconomyclass